US Patent Class 235
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Current as of: June, 1999
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  DF  CLASS NOTES
1 R  DF  MISCELLANEOUS
1 A  DF  .~ Shutters
1 B  DF  .~ Game counters
1 C  DF  .~ Numeral wheels
1 D  DF  .~ Casings
1 E  DF  .~ Toy cash registers
1 F  DF  .~ "Fugitive one" mechanism
2  DF  CASH REGISTERS AND RECORDERS
3  DF  .~ Check printing
4  DF  CASH RECORDERS
5  DF  .~ Manual
7 R  DF  CASH REGISTERS
6  DF  .~ Departmental
8  DF  .~ Key set
9  DF  .~.~ Crank operated
10  DF  .~.~ Drawer operated
11  DF  .~.~ Motor operated
12  DF  .~ Key operated
13  DF  .~.~ Detail adders
14  DF  .~.~ Differential mechanism
15  DF  .~.~.~ Key coupled
16  DF  .~.~.~ Lost-motion mechanism
17  DF  .~ Checks
18  DF  .~.~ Balls
19  DF  .~ Dial
20  DF  .~.~ Independent indicator
21  DF  .~.~ Lever operated
22  DF  .~ Drawer-operating mechanism
23  DF  .~ Indicator mechanism
24  DF  .~.~ Shutters
25  DF  .~.~ Tablet droppers
26  DF  .~ Key arresters
27  DF  .~ Key locks
28  DF  .~ Lid registers
7 A  DF  .~ Refund devices and coin change
33  DF  FARE REGISTERS
29 R  DF  .~ Multiple
29 A  DF  .~.~ Fare register seal
30 R  DF  .~ Cab-fare indicating
30 A  DF  .~.~ Meter preparation
31 R  DF  .~ Ticket delivery
31 T  DF  .~.~ Issue and print
32  DF  .~ Registering boxes
34  DF  .~ Dial and cylinder
35  DF  .~ Belt
36  DF  .~ Parallel axes
37  DF  .~.~ Cylinder
38  DF  .~.~ Dial and hand
39  DF  .~.~ Disk
40  DF  .~ Single axis
41  DF  .~.~ Concentric disk
42  DF  .~.~ Cylinder
43  DF  .~.~ Dial and hand
44  DF  .~ Operating devices
45  DF  .~.~ Electric
46  DF  .~.~ Punch
47  DF  .~ Resetting
48  DF  .~.~ Direction indicator
49  DF  .~ Hundreds indicator
51  DF  VOTING MACHINES
50 R  DF  .~ Recording
50 A  DF  .~.~ Recording and registering
50 B  DF  .~.~ Voting machines, recording
52  DF  .~ Assembly
53  DF  .~ Check operated
54 R  DF  .~ Key set
54 A  DF  .~.~ Interlocks, voting machines
54 B  DF  .~.~ Endorsed candidate lockout
54 C  DF  .~.~ Primary voting mechanism
54 D  DF  .~.~ Cumulative interlocks for voting machines
54 E  DF  .~.~ Independent voting mechanism
54 F  DF  .~.~ Voting machines, electric
55 R  DF  .~ Key operated
55 A  DF  .~.~ Interlocks; voting machine
55 C  DF  .~.~ Primary lockouts
55 E  DF  .~.~ Independent voting mechanism
56  DF  .~ Vote counters
57  DF  REGISTERING BALLOT BOXES
375  DF  SYSTEMS CONTROLLED BY DATA BEARING RECORDS
376  DF  .~ Operations analysis
377  DF  .~ Time analysis
378  DF  .~.~ Price determination
379  DF  .~ Banking systems
380  DF  .~ Credit or identification card systems
381  DF  .~.~ With vending
382  DF  .~.~ Permitting access
382.5  DF  .~.~.~ Changeable authorization
383  DF  .~ Mechanized store
384  DF  .~ Transportation
385  DF  .~ Inventory
386  DF  .~ Voting machine
400  DF  ORDNANCE OR WEAPON SYSTEMS COMPUTER
401  DF  .~ Bombing
402  DF  .~.~ Toss
403  DF  .~ Torpedo director
404  DF  .~ Aiming
405  DF  .~.~ Mechanical computation
406  DF  .~.~.~ With tabular chart, scale, or graph
407  DF  .~.~ Compensating for weapon movement (e.g., tilt)
408  DF  .~ Projectile flight time - fuse setting
409  DF  .~ Parallex compensation
410  DF  .~ Coordinate conversion
411  DF  .~ With target tracking means
412  DF  .~.~ Position or course prediction
413  DF  .~.~ Calculating speed and direction
414  DF  .~ Range finder
415  DF  .~.~ With range rate change
416  DF  .~.~ Range prediction
417  DF  .~ Ballistic factor determination
418  DF  .~ Hand adjusted scale mechanism
419  DF  RECORD CONTROLLED CALCULATORS
420  DF  .~ Machine control
421  DF  .~ Multiplying
422  DF  .~ Dividing
423  DF  .~ Subtraction
424  DF  .~ Item distribution
425  DF  .~ Sorting and accounting
426  DF  .~ Relay- or contact-type storing or accumulating
427  DF  .~ Differential mechanism, synchronous
428  DF  .~ Differential mechanism, stop set
429  DF  .~ Translators
430  DF  .~ Key operators
431  DF  .~ With data comparing
432  DF  .~ With printing
433  DF  .~.~ With paper feeding
434  DF  .~ With punching
435  DF  CODED RECORD SENSORS
436  DF  .~ Readout control
437  DF  .~ Error checking
438  DF  .~ Testing
439  DF  .~ Particular sensor structure
440  DF  .~.~ Multiple sensor
441  DF  .~.~ Electrical contact
442  DF  .~.~.~ Perforated
443  DF  .~.~.~.~ Static sensed
444  DF  .~.~ Electromechanical
445  DF  .~.~.~ Perforated record
446  DF  .~.~.~.~ Sensing element in continuous contact with record
447  DF  .~.~.~.~ Array
448  DF  .~.~.~ Raised or depressed portions on record
449  DF  .~.~ Magnetic
450  DF  .~.~.~ Strengthen or diminish field or flux
451  DF  .~.~ Capacitive
452  DF  .~.~ Pneumatic
453  DF  .~.~ Mechanical
454  DF  .~.~ Optical
455  DF  .~.~.~ Light level control
456  DF  .~.~.~ Multiple column code
457  DF  .~.~.~ Holographic
458  DF  .~.~.~ Perforated record
459  DF  .~.~.~.~ Stationary
460  DF  .~.~.~.~.~ Matrix of cells
461  DF  .~.~.~.~ One dimensional scan
462.01  DF  .~.~.~ Bar code
462.02  DF  .~.~.~.~ Bar code having a plurality of bars with different heights (e.g., Postnet
462.03  DF  .~.~.~.~ Circular bar code (e.g., concentric circles or sun burst)
462.04  DF  .~.~.~.~ Bar code with bars of more than two colors (e.g., multicolored bar code, multilevel gray)
462.05  DF  .~.~.~.~ Means to read bar code on a transparent medium (e.g., film)
462.06  DF  .~.~.~.~ Light level adaptation
462.07  DF  .~.~.~.~ Means to decode multiple types or formats of bar code symbols (e.g., UPC, JAN, EAN, etc.)
462.08  DF  .~.~.~.~ Bar code location or selection
462.09  DF  .~.~.~.~.~ 2-D bar code
462.1  DF  .~.~.~.~ Means to decode a 2-D bar code
462.11  DF  .~.~.~.~.~ Including an imager (e.g., CCD or camera-type reader)
462.12  DF  .~.~.~.~ Bar code stitching (e.g., forming a complete bar code from several partial scans)
462.13  DF  .~.~.~.~ Combined with diverse art device (e.g., security tag deactivator)
462.14  DF  .~.~.~.~ Stationary bar code reader
462.15  DF  .~.~.~.~ Programming or computer interface feature
462.16  DF  .~.~.~.~ Bar width determination
462.17  DF  .~.~.~.~.~ Using plural sensors
462.18  DF  .~.~.~.~.~ Using counter or timer
462.19  DF  .~.~.~.~.~.~ Including count or time to binary conversion (e.g., Wide=1, Narrow=0)
462.2  DF  .~.~.~.~ Aiming or positioning adjunct (e.g., viewfinder, pointer, or positioning aid)
462.21  DF  .~.~.~.~.~ Using spotter beam
462.22  DF  .~.~.~.~ Extended reader working range (e.g., multiple focal planes)
462.23  DF  .~.~.~.~.~ Auto-focusing
462.24  DF  .~.~.~.~.~.~ Using an imager (e.g., CCD or camera-type reader)
462.25  DF  .~.~.~.~ Reader processing circuitry
462.26  DF  .~.~.~.~.~ Amplitude control (e.g., automatic gain control)
462.27  DF  .~.~.~.~.~ Analog to square wave converter (e.g., digitizer, binarizer, slicer)
462.28  DF  .~.~.~.~.~ Clock generating or sampling circuit
462.29  DF  .~.~.~.~.~ Noise reduction circuit (e.g., electrical filters)
462.3  DF  .~.~.~.~ Scanner power on/off
462.31  DF  .~.~.~.~.~ Including object detection
462.32  DF  .~.~.~.~ Specific scanning detail (e.g., scanner with a specific scanning field of view)
462.33  DF  .~.~.~.~.~ Moving a spot of light (e.g., flying spot scanner)
462.34  DF  .~.~.~.~.~.~ Hologram
462.35  DF  .~.~.~.~.~.~ Having a transmissive optical element (e.g., lens, prism, or aperture)
462.36  DF  .~.~.~.~.~.~ Using a moving mirror
462.37  DF  .~.~.~.~.~.~.~ Pattern mirror detail for nonrotating mirror
462.38  DF  .~.~.~.~.~.~.~ Rotating
462.39  DF  .~.~.~.~.~.~.~.~ Polygon
462.4  DF  .~.~.~.~.~.~.~.~.~ Pattern mirror detail for rotating mirror
462.41  DF  .~.~.~.~ Using an imager (e.g., CCD)
462.42  DF  .~.~.~.~.~ Illumination detail (e.g., LED array)
462.43  DF  .~.~.~.~ Specified housing or mounting detail
462.44  DF  .~.~.~.~.~ Body attached
462.45  DF  .~.~.~.~.~ Hand-held (e.g., portable)
462.46  DF  .~.~.~.~.~.~ Wireless link (e.g., RF, IR, etc.)
462.47  DF  .~.~.~.~.~.~ Interchangeable scanning head or detachable handle
462.48  DF  .~.~.~.~.~.~ Trigger detail
462.49  DF  .~.~.~.~.~.~ Wand-type reader (e.g., manual scan)
468  DF  .~.~.~ Invisible
469  DF  .~.~.~ Color coded
470  DF  .~.~.~ With scanning of record
471  DF  .~.~.~.~ Cathode-ray tube
472.01  DF  .~.~.~ Hand-held (e.g., portable)
472.02  DF  .~.~.~.~ Wireless link (e.g., RF, IR, etc.)
472.03  DF  .~.~.~.~ Wand-type reader (e.g., manual scan)
473  DF  .~.~.~ Light pipes
474  DF  .~ Synchronization
475  DF  .~ Feed mechanisms
476  DF  .~.~ Control circuits
477  DF  .~.~.~ Direction
478  DF  .~.~ Pneumatic feed
479  DF  .~.~ Carriage
480  DF  .~.~ Direction reverse
481  DF  .~.~ Intermittent feed
482  DF  .~ Hand feed
483  DF  .~ Guides
484  DF  .~.~ Adjustable
485  DF  .~.~ Aligning records
486  DF  .~ Holding devices
487  DF  RECORDS
488  DF  .~ Laminated
489  DF  .~ Perforated
490  DF  .~ Projections
491  DF  .~ Fluorescent, phosphorescent, radiation emitting
492  DF  .~ Conductive
493  DF  .~ Magnetic
494  DF  .~ Particular code pattern
495  DF  .~ Templates and guides
61 R  DF  CALCULATORS
58 R  DF  .~ Recording
59 R  DF  .~.~ Key operated
59 A  DF  .~.~.~ Miscellaneous key operated recording
59 BC  DF  .~.~.~ Multiplying unitary base
59 BD  DF  .~.~.~ Wahl type
59 BE  DF  .~.~.~ Flat bed
59 BF  DF  .~.~.~ Attachment for typewriters
59 CP  DF  .~.~.~ Clear sign printing
59 BG  DF  .~.~.~ Power operated
59 TP  DF  .~.~.~ Total printing
59 T  DF  .~.~.~ Typewriter
59 BH  DF  .~.~.~ Addendoraphs
60 R  DF  .~.~ Key set
60.11  DF  .~.~.~ By means other than printing or punching
60.12  DF  .~.~.~ Combined with typewriter
60.13  DF  .~.~.~ Multiple recording means
60.19  DF  .~.~.~ Distinctive color
60.15  DF  .~.~.~ Non-numerical data
60.16  DF  .~.~.~.~ Alphabetical
60.17  DF  .~.~.~.~ Clearance symbol
60.18  DF  .~.~.~.~ Function indicating character or symbol
60.2  DF  .~.~.~ True negative total recording
60.22  DF  .~.~.~.~ Electric readout
60.23  DF  .~.~.~ With split printing
60.24  DF  .~.~.~ With extended totals
60.25  DF  .~.~.~ Non-recording controls
60.26  DF  .~.~.~ Non-add controls
60.27  DF  .~.~.~ Gang recording
60.28  DF  .~.~.~.~ With zero recording controls
60.29  DF  .~.~.~.~ By punching
60.3  DF  .~.~.~.~ With total taking
60.31  DF  .~.~.~.~.~ By zeroizing result elements
60.32  DF  .~.~.~.~.~.~ With blank cycle elimination
60.33  DF  .~.~.~.~.~ By sensing result elements
60.34  DF  .~.~.~.~.~.~ Combined with zeroizing
60.35  DF  .~.~.~.~.~ By differential timing
60.37  DF  .~.~.~.~.~ By direct impression from result elements
60.38  DF  .~.~.~ Digit by digit recording
60.39  DF  .~.~.~.~ With total taking
60.4  DF  .~.~.~.~.~ Electrical
60.41  DF  .~.~.~ With traveling paper carriage
60.42  DF  .~.~.~.~ Control of carriage feed
60.44  DF  .~.~.~.~.~ Shuttle type operation
60.45  DF  .~.~.~.~.~ Power operation
60.46  DF  .~.~.~.~.~ Columnar
60.47  DF  .~.~.~.~ Control of function by carriage
60.48  DF  .~.~.~.~.~ Totalizer selection
60.49  DF  .~.~.~.~.~ Locking devices
60.5  DF  .~.~.~.~.~ Carriage bore function control structures
60.51  DF  .~.~.~.~ Control of platen or paper feed
60.52  DF  .~.~.~.~ Control of functions from platen or paper feed
60 D  DF  .~.~.~ Dalton
60 E  DF  .~.~.~ Ellis
60 G  DF  .~.~.~ Gardner
60 HP  DF  .~.~.~ Hopkin
60 MT  DF  .~.~.~ Multiple totalizers
60 M  DF  .~.~.~ Multiplying
60 PY  DF  .~.~.~ Pay roll
60 S  DF  .~.~.~ Split
60 SS  DF  .~.~.~ Sundstrand
60 TK  DF  .~.~.~ Ten key
60 C  DF  .~.~.~ Item counting
60 TN  DF  .~.~.~ True negative
60 HN  DF  .~.~.~ Hanson
60 P  DF  .~.~.~ Print
60 AP  DF  .~.~.~ Automatic total print
60 TW  DF  .~.~.~ Typewriter
60 B  DF  .~.~.~ Burroughs
60 CK  DF  .~.~.~ Crank
58 M  DF  .~.~ Miscellaneous
58 CW  DF  .~.~ Check writers and markers
58 CF  DF  .~.~ Paper and carriage feed
58 PS  DF  .~.~ Price scales
58 P  DF  .~.~ Print
200 R  DF  .~ Including means utilizing fluid, e.g., fluid amplifiers
201 R  DF  .~.~ Digital pulse
201 ME  DF  .~.~.~ Moving elements
201 FS  DF  .~.~.~ Fluid sensor
201 PF  DF  .~.~.~ Pure fluid
200 PF  DF  .~.~ Analog pure fluid
200 WB  DF  .~.~ Weigh beam
62 R  DF  .~ Motor actuated
62 A  DF  .~.~ Key set
62 B  DF  .~.~ Key operated
62 C  DF  .~.~ Wright - Degene (underwood) type
62 D  DF  .~.~ Calculators, motor actuated
62 E  DF  .~.~ Calculators, motor actuated, Elliot Fischer type
62 F  DF  .~.~ Motor circuit and clutch control (mult. and div. control)
63 R  DF  .~ Traveling carriage
63 A  DF  .~.~ Manually operated
63 B  DF  .~.~ Machines with ten keys or less
63 C  DF  .~.~ With master wheels
63 D  DF  .~.~ Power operated
63 E  DF  .~.~ Auto-control incident to multiplying and dividing
63 F  DF  .~.~ Auto-control incident to dividing
63 G  DF  .~.~ Divided - divisor aligning mechanism
63 H  DF  .~.~ Automatic multiplication
63 J  DF  .~.~ Both factors preset in full
63 K  DF  .~.~ One factor only preset in full
63 L  DF  .~.~ Miscellaneous
63 KP  DF  .~.~ Key operated
63 KS  DF  .~.~ Key set
63 DE  DF  .~.~ Decimal elimination
64  DF  .~ Adding pencils
64.3  DF  .~ Decimal point locators
64.7  DF  .~ Photographic
65  DF  .~ Bar and disk
66  DF  .~ Cylinder and disk
67  DF  .~ Spiral
68  DF  .~ Ball
69  DF  .~ Bar
70 R  DF  .~.~ Slide rules
70 A  DF  .~.~.~ Special use slide rule
70 B  DF  .~.~.~ Runners, cursors
70 C  DF  .~.~.~ Scales
70 D  DF  .~.~.~ Slide rule pencils
71 R  DF  .~ Belt
71 A  DF  .~.~ Slide rule tape
72  DF  .~ Parallel axes
73  DF  .~.~ Cylinder
74  DF  .~.~ Disk
75 R  DF  .~.~.~ Key operated
75 T  DF  .~.~.~.~ Thomas-type machines
76  DF  .~.~ Gear
77  DF  .~ Single axis
78 R  DF  .~.~ Concentric disk
78 A  DF  .~.~.~ Adders
78 F  DF  .~.~.~ Financial
78 G  DF  .~.~.~ Games
78 M  DF  .~.~.~ Mathematics
78 N  DF  .~.~.~ Navigation
78 RC  DF  .~.~.~ Rhythm calculators
79  DF  .~.~ Cylinder
79.5  DF  .~.~.~ Slide rules
80  DF  .~.~.~ Keyless
81 R  DF  .~.~.~.~ Lever operated
81 A  DF  .~.~.~.~.~ Odner type
82 R  DF  .~.~.~ Key operated
82 C  DF  .~.~.~.~ Comptometer
82 FK  DF  .~.~.~.~ Five key
82 TK  DF  .~.~.~.~ Ten key
82 MK  DF  .~.~.~.~ More than ten keys
82 SK  DF  .~.~.~.~ Single key operated multiplying
82 K  DF  .~.~.~.~ Key set
83  DF  .~.~ Disk; dial and hand
84  DF  .~.~.~ Slide rules
85 R  DF  .~ Tabular
86  DF  .~.~ Belt
87 R  DF  .~.~ Cylinder
87 A  DF  .~.~.~ Computing and weighing scales
88 R  DF  .~.~ Disk
88 F  DF  .~.~.~ Financial
88 G  DF  .~.~.~ Games
88 M  DF  .~.~.~ Mathematics
88 N  DF  .~.~.~ Navigation
88 RC  DF  .~.~.~ Rhythm calculators
89 R  DF  .~.~ Sheet
89 A  DF  .~.~.~ Computing and weighing scales
85 FC  DF  .~.~ Rhythm cycle (fertility)
61 A  DF  .~ Miscellaneous
61 B  DF  .~ Tabular
61 C  DF  .~ Integrating
61 D  DF  .~ Chart integrators
61 DP  DF  .~ Decimal point indicators
61 E  DF  .~ Mean or average computers
61 F  DF  .~ Multiplying machine - miscellaneous
61 FA  DF  .~ Precomputed products
61 FB  DF  .~ Variator with counter
61 FC  DF  .~ Variator with accumulator
61 FD  DF  .~ Partial products
61 FE  DF  .~ Successive addition
61 G  DF  .~ Odds computers
61 GM  DF  .~ Geometrical
61 J  DF  .~ Miles per gallon
61 K  DF  .~ Partial product wherein result is obtained in (one) summation
61 P  DF  .~ Polynominal
61 L  DF  .~ Variators - change speed gear devices
61 M  DF  .~ Volume and price computers
61 NV  DF  .~ Navigational
61 PS  DF  .~ Computing scales
61 PA  DF  .~ Mechanical input-output
61 PB  DF  .~ Input-output with storage
61 PC  DF  .~ Input-output from racks to computer
61 PD  DF  .~ Input-output from register to computer
61 PE  DF  .~ Input-output from keyboard to computer
61 PF  DF  .~ Input-output from typewriter to computer
61 PG  DF  .~ Electrical from computer to adding machine
61 PH  DF  .~ Input-output electrical from calculator to typewriter
61 PJ  DF  .~ Input-output electrical from computer to card or tape
61 PK  DF  .~ Input-output calculator to indicator, printer, etc.
61 PL  DF  .~ Storage medium conversion
61 PM  DF  .~ Interconnection, sequencing and programming
61 S  DF  .~ Transportation
61 T  DF  .~ Transportation balance computers
61 V  DF  .~ Transportation time-distance schedules
90  DF  PEG TALLY BOARDS
102  DF  TYPEWRITER WORD COUNTERS
94 R  DF  LIQUID REGISTERS
94 A  DF  .~ Volume and price
98 R  DF  PACKAGE OPERATED
98 A  DF  .~ Reactive package
98 B  DF  .~ Package operated switch
98 C  DF  .~ Interrupted radiant energy ray
100  DF  REGISTERING BOXES
99 R  DF  PLATFORM OPERATED
99 A  DF  .~ Platform actuated traffic counters
101  DF  STAMP
93  DF  GATE AND TURNSTILE OPERATED
95 R  DF  ODOMETERS
96  DF  .~ Details
97  DF  .~ Trip and total
95 A  DF  .~ Excess speed
95 B  DF  .~ Hub
95 C  DF  .~ Odometers, pendulum type
103  DF  ROTATION COUNTERS
103.5 R  DF  .~ Comparing
103.5 E  DF  .~.~ Extensometers
104  DF  .~ Timing devices
105  DF  PEDOMETERS
123  DF  BALL BUTTON OR PUSH BUTTON INDICATOR
124  DF  BAR AND SCALE
125  DF  BELT
127  DF  PIVOTED INDICATOR
106  DF  ANGLED AXES
107  DF  SPIRAL
108  DF  PARALLEL AXES
109  DF  .~ Gear
110  DF  .~ Cylinder
111  DF  .~ Dial and disk
112  DF  .~ Dial and hand
113  DF  .~ Disk
114  DF  .~.~ Hand operated
115  DF  SINGLE AXIS
116  DF  .~ Concentric disk
117 R  DF  .~ Cylinder
118  DF  .~.~ Single cylinder
117 A  DF  .~.~ Manually operated
119  DF  .~ Differential gears
*  DD  .~ Dial and hand
120  DF  .~.~ Multiple hand
121  DF  .~.~ Single hand
122  DF  .~ Disk
91 R  DF  OPERATING DEVICES
91 PR  DF  .~ Plural registers
91 A  DF  .~ Double acting pawl escapement with double arm pawl
91 B  DF  .~ Billiards and pool
91 C  DF  .~ Photograph
91 D  DF  .~ Time interval totals
91 E  DF  .~ Telephone
91 F  DF  .~ Pressure and vacuum
91 G  DF  .~ Summation
91 H  DF  .~ Inertia, speed and distance indicator
91 J  DF  .~ Register key
91 K  DF  .~ Register ball actuated
91 L  DF  .~ Mechanical store
91 M  DF  .~ Magnetic
128  DF  ALARM MECHANISM
130 R  DF  LOCKING MECHANISM
130 KD  DF  .~ Incomplete key depression
130 TC  DF  .~ Typewriter computing
131 R  DF  OVERTHROW PREVENTERS
131 FD  DF  .~ Frictional detent
131 M  DF  .~ Miscellaneous
131 JA  DF  .~ Jamming action
132 R  DF  WITH CONTROL MEANS OPERABLE ON PREDETERMINED REGISTER READING
132 A  DF  .~ Predetermined count, self-resetting
132 E  DF  .~ Electrical
133 R  DF  TRANSFER MECHANISM
134  DF  .~ Cam and lever
135  DF  .~ Deep notch
136  DF  .~ Differential gears
137  DF  .~ Independent actuator
138  DF  .~.~ Successive
139 R  DF  .~ Intermediate pinion
139 A  DF  .~.~ Internal pinion
140  DF  .~ Side tooth
141  DF  .~.~ Lock
142  DF  .~ Traveling pawl
143  DF  .~.~ Side action
133 A  DF  .~ Electrical
144 R  DF  ZERO-SETTING DEVICES
144 DM  DF  .~ Disconnected member
144 M  DF  .~ Miscellaneous
144 PN  DF  .~ Pawl and notch
144 ME  DF  .~ Magnetic, electromagnetic, and electric motor reset
144 C  DF  .~ Complement
144 HC  DF  .~ Heart cam
144 D  DF  .~ Dispensing
144 S  DF  .~ Shaft set, miscellaneous
144 SS  DF  .~ Separate shaft
144 SM  DF  .~ Shaft movable
144 SP  DF  .~ Spring
144 MG  DF  .~ Mutilated gear
144 TP  DF  .~ Traveling pawl
144 ET  DF  .~ Elapsed time registering
144 MA  DF  .~ Maximum demand
144 B  DF  .~ Rake reset
144 EA  DF  .~ External mechanism only with or without drive disconnect
144 E  DF  .~ Electrical
144 TB  DF  .~ Total printing
145 R  DF  KEYBOARDS
146  DF  .~ Auxiliary
145 A  DF  .~ With total transfer to keyboard or the like
*********************************
CROSS-REFERENCE ART COLLECTIONS
*********************************
900  DF  MEANS TO AFFIX BAR CODE (E.G., ATTACHING, ETCHING, COATING, PRINTING, ETC.)
901  DF  BAR CODE READER SPECIALIZED TO READ CODE ON A HIGHLY REFLECTIVE SURFACE
*********************************
FOREIGN ART COLLECTIONS
*********************************
*  DD  CODED RECORD SENSORS (235/435)
*  DD  .~ Particular sensor structure (235/439)
*  DD  .~.~ Optical (235/454)
FOR 100  DF  .~.~.~ Bar code (235/462)
FOR 101  DF  .~.~.~.~ Bar with detection (235/463)
FOR 102  DF  .~.~.~.~ Radially configured (235/464)
FOR 103  DF  .~.~.~.~ Color (235/465)
FOR 104  DF  .~.~.~.~ Timing (235/466)
FOR 105  DF  .~.~.~.~ Rotating prisms or mirrors (235/467)
*  DD  CODED RECORD SENSORS (235/435)
*  DD  .~ Particular sensor structure (235/439)
*  DD  .~.~ Optical (235/454)
FOR 106  DF  .~.~.~ Hand held (235/472)