US Patent Class 104
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Current as of: June, 1999
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Products
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Services

  DF  CLASS NOTES
2  DF  TRACK LAYERS
3  DF  .~ Built-up sections
4  DF  .~ Portable shifter
5  DF  .~ Distributers
6  DF  .~.~ Transverse tie placer
7.1  DF  .~ Track raising car
7.2  DF  .~.~ With means to transversely shift track (i.e., aligning)
7.3  DF  .~.~ Under-track ballast sled or plow
8  DF  .~ Sluer
9  DF  .~ Tie replacer
10  DF  .~ Tamper
11  DF  .~.~ Pneumatic injector
12  DF  .~.~ Car mounted
13  DF  .~.~ Hand tools
14  DF  .~.~.~ Pneumatic
15  DF  .~ Joint welders
16  DF  .~ Tie platers
17.1  DF  .~ Track rail mounted spike driver
17.2  DF  .~ Trail rail mounted rail anchor applicator
18  DF  MOVING TRAIN
19  DF  .~ Safety lander
20  DF  .~ Passenger transfer
21  DF  .~.~ Revolving terminal
22  DF  BALLOON
23.1  DF  FLUID SUPPORTED CAR OR SIMULATED AERIAL VEHICLE
23.2  DF  .~ Car supported by fluid current pushing against surface
24  DF  SAILING DEVICES
25  DF  ENDLESS TRAIN
26.1  DF  CAR YARD
26.2  DF  .~ Track brake
27  DF  TERMINALS AND STATIONS
28  DF  .~ Passenger
29  DF  .~ Freight
30  DF  .~ Platforms
31  DF  .~.~ Shifting
32.1  DF  TRUCK CHANGER
33  DF  .~ Wheel-gauge changers
34  DF  VEHICLE BATTERY REPLACER
35  DF  TURNTABLES
36  DF  .~ Actuators
37  DF  .~.~ Fluid pressure
38  DF  .~.~ Electric control
39  DF  .~.~ Traction cable
40  DF  .~.~ Vehicle operated
41  DF  .~.~.~ Drive wheel
42  DF  .~.~.~ Gravity
43  DF  .~.~ Traction wheel
44  DF  .~ Automobile
45  DF  .~ Portable
46  DF  .~ Bearings and pivots
47  DF  .~ Locks
48  DF  TRANSFER TABLES
49  DF  .~ Swinging
50  DF  .~ Operating mechanism
51  DF  LOCOMOTIVE SHED FIXTURES
52  DF  .~ Smoke jacks
53  DF  AMUSEMENT
54  DF  .~ Gap jumpers
55  DF  .~ Loop
56  DF  .~ Helical
57  DF  .~.~ Rotating
58  DF  .~ Moving-wave track
59  DF  .~ Drifting tub
60  DF  .~ Racing
61  DF  .~ Horse simulation
62  DF  .~ Physical training
63  DF  .~ Tortuous alinement
64  DF  .~.~ Horizontal zigzag
65  DF  .~.~.~ Exchanging gears
66  DF  .~.~.~ Chain drive
67  DF  .~ Switchback
68  DF  .~ Bowl, cylinder, or globe
69  DF  .~ Chutes
70  DF  .~.~ Water dive
71  DF  .~ Submarines
72  DF  .~ Splasher
73  DF  .~ Canals
74  DF  .~ Rotary car on truck
75  DF  .~.~ Vertical axis
76  DF  .~.~ Horizontal axis
77  DF  .~ Car in wheel
78  DF  .~.~ Traveling
79  DF  .~ Seesaw track
80  DF  .~ Seesaw car drive
81  DF  .~ Swing car drive
82  DF  .~ Passenger jumper
83  DF  .~ Illusion vehicles
84  DF  .~ Optical illusion
85  DF  .~ Physical illusion
86  DF  .~ Hydraulic effects
87  DF  CABLE AND RIGID COMBINED
88.01  DF  SELECTIVE DELIVERY
88.02  DF  .~ Electrical control
88.03  DF  .~.~ Centralized
88.04  DF  .~.~.~ Including local control
88.05  DF  .~.~ Including override feature
88.06  DF  .~.~ Including pre-established manual setting
89  DF  SUSPENDED
90  DF  .~ Ferry
91  DF  .~ Track systems
92  DF  .~ Swing boom track
93  DF  .~ Single-rail type
94  DF  .~ Double inner rail
95  DF  .~ Double outer rail
96  DF  TROLLEY TRANSFER
97  DF  .~ Beef-jack type
98  DF  .~ Overhead crane
99  DF  .~ Turntable type
100  DF  .~ Horizontal end pivot
101  DF  .~ Longitudinal pivot
102  DF  .~ Sliding shift
103  DF  .~ Swing stub
104  DF  .~ Split point
105  DF  .~ Rigid frog
106  DF  TROLLEY RAILS
107  DF  .~ Two tread
108  DF  .~.~ Slotted tube
109  DF  .~.~ Integral
110  DF  .~ Single tread
111  DF  .~ Hangers
112  DF  CABLE RAILS
113  DF  .~ Gravity
114  DF  .~ Extensible marine
115  DF  .~ Hangers and saddles
116  DF  .~.~ Vertible movement
117  DF  .~ Tension regulators and anchors
117.1  DF  .~ With automatic stopping or reversing
118  DF  MONORAIL
119  DF  .~ With side guides
120  DF  .~ Raised center rail
121  DF  .~ Single top guide
122  DF  DROP PICK UP
123  DF  WAY SUSPENSION
124  DF  ELEVATED STRUCTURE
125  DF  POSTS AND TOWERS
126  DF  PORTABLE ELEVATED
127  DF  ELEVATORS
128  DF  .~ Car
129  DF  .~ Track control
130.01  DF  SWITCHES
130.02  DF  .~ For levitated vehicle
130.03  DF  .~.~ Having movable track elements
130.04  DF  .~ For vertical guide
130.05  DF  .~ Having longitudinal pivot axis
130.06  DF  .~ Having horizontal sliding shift
130.07  DF  .~ Having all stationary track elements
130.08  DF  .~ For toothed rail
130.09  DF  .~ Having movable track element for slot-guided vehicle
130.11  DF  .~ Having flexible element
133  DF  DROPPINGS CATCHER
134  DF  SLEDWAYS
135  DF  .~ Roller track
136  DF  .~ Ice track
137  DF  TRAVELING TRACK
138.1  DF  TUBULAR WAY
138.2  DF  .~ Internal service device
139  DF  TRUCK IN CONDUIT
140  DF  SLOTTED CONDUIT
141  DF  .~ Crossings
142  DF  .~ Yokes
143  DF  .~.~ Concrete
144  DF  .~.~ Integral metallic
145  DF  .~ Grip or plow traps
146  DF  .~ Adjustable slots
281  DF  MAGNETICALLY SUSPENDED CAR
282  DF  .~ Propulsion means employed to suspend car
283  DF  .~ By permanent magnets only
284  DF  .~ Including means to sense or control car position or attitude with respect to guideway
285  DF  .~ With cooling means
286  DF  .~ Construction or composition of suspension elements
287  DF  CAR-CARRIED PROPULSION SYSTEM
288  DF  .~ Electric
289  DF  .~.~ With regenerative energy means
290  DF  .~.~ Linear motor
291  DF  .~.~.~ Suspension between truck and vehicle body
292  DF  .~.~.~ Propulsion by active guideway; e.g., linear synchronous motor, etc.
293  DF  .~.~.~ Including means to control gap
294  DF  .~.~.~ Construction or composition of motor elements
295  DF  .~.~ External car control
296  DF  .~.~.~ Auxiliary function on car
297  DF  .~.~.~.~ Superimposed signal on same conductor
298  DF  .~.~.~ By block system
299  DF  .~.~.~ Of spacing between cars
300  DF  .~.~.~ Car-carried speed regulator
301  DF  .~.~.~ Of multiple trains on same track
302  DF  .~.~.~ Reversing of car movement or conductor current
303  DF  .~.~.~.~ By switch responsive to discrete means along guideway
304  DF  .~.~.~ Of steerable car
305  DF  .~.~.~ Of slot-guided car
154  DF  .~ Hydraulic
155  DF  .~ Pneumatic
156  DF  .~.~ Piston tube
157  DF  .~.~ Motor charging
158  DF  .~.~.~ Moving car
159  DF  .~.~.~.~ Longitudinal supply tube
160  DF  .~.~.~.~.~ Sliding-sleeve receiver
161  DF  .~.~ Sealing slot closers
164  DF  TILTING TRACK
165  DF  TRACTION
162  DF  .~ Pusher
163  DF  .~.~ Rotary
166  DF  .~ Longitudinal rotary shafts
167  DF  .~ Helical
168  DF  .~ Transverse live roll
169  DF  .~ Reciprocating farm tool
170  DF  .~ Truck distribution
171  DF  .~.~ Two-wheel type
172.1  DF  .~ Chain
172.2  DF  .~.~ Tow pin or mast
172.3  DF  .~.~ Beneath vehicle
172.4  DF  .~.~ Suspended
172.5  DF  .~.~ Chain construction
173.1  DF  .~ Cable
173.2  DF  .~.~ Ski tow
174  DF  .~.~ Counterbalanced system
175  DF  .~.~.~ Weight
176  DF  .~.~ Mule car
177  DF  .~.~ Mail
178  DF  .~.~ Drive and control
179  DF  .~.~.~ Signals
180  DF  .~.~ Running and carrying cable
181  DF  .~.~.~ Mail
182  DF  .~.~ Clearing-way hangers
183  DF  .~.~ Drum-wind draft
184  DF  .~.~ At switches
185  DF  .~.~ Crossing conduit
186  DF  .~.~.~ Cable depressors
187  DF  .~.~.~ Auxiliary car propulsion
188  DF  .~.~ At swing bridges
189  DF  .~.~ Curves
190  DF  .~.~.~ Auxiliary car propulsion
191  DF  .~.~.~ Horizontal pulley
192  DF  .~.~.~ Double-rope system
193  DF  .~.~ Draft-cable coupling
194  DF  .~.~ Slot closers
195  DF  .~.~ Slot switches
196  DF  .~.~ Take-ups
197  DF  .~.~ Supporting pulley
198  DF  .~.~ Cable shifters
199  DF  .~.~ Cable lifters
200  DF  .~.~ Cable clips
201  DF  .~.~.~ Strand engaging
202  DF  .~.~ Grippers
203  DF  .~.~.~ Pneumatically operated
204  DF  .~.~.~ Automatic grip control
205  DF  .~.~.~.~ Trip lever
206  DF  .~.~.~.~.~ Toggle-operated jaw
207  DF  .~.~.~.~ Releasable pawl
208  DF  .~.~.~.~ Weight-operated jaw
209  DF  .~.~.~.~ Spring-pressed jaw
210  DF  .~.~.~.~ Screw operated
211  DF  .~.~.~.~ Cam operated
212  DF  .~.~.~.~ Wedge operated
213  DF  .~.~.~ Longitudinal buffer
214  DF  .~.~.~ Laterally movable jaws
215  DF  .~.~.~.~ With guide rollers
216  DF  .~.~.~ Pivoted and fixed jaws
217  DF  .~.~.~ Forceps
218  DF  .~.~.~ Vertically movable jaws
219  DF  .~.~.~.~ Pawl lever and link
220  DF  .~.~.~.~ With guide rollers
221  DF  .~.~.~.~.~ Pawl lever and link
222  DF  .~.~.~ Wedge
223  DF  .~.~.~ Screw
224  DF  .~.~.~ Cam
225  DF  .~.~.~ V-clips or hooks
226  DF  .~.~.~ Friction belt
227  DF  .~.~.~ Overstepping
228  DF  .~.~.~.~ Revolving
229  DF  .~.~.~ Rollers
230  DF  .~.~.~.~ Power transmitting
231  DF  .~.~.~.~ Laterally movable
232  DF  .~.~.~.~ Vertically movable
233  DF  .~.~.~.~.~ Opposing twin
234  DF  .~.~.~.~.~ Staggered
235  DF  .~.~.~ Whelp wheel
236  DF  .~.~.~ Sprocket wheel
237  DF  .~.~.~ Sprocket belt
238  DF  .~.~.~ Drive stops on car
239  DF  .~.~.~ Cable-driving stops
240  DF  .~.~ Cable construction
241  DF  SEAT-GUARD CONTROL
242  DF  DERAILMENT GUARDS
243  DF  .~ Supplemental car wheels and rails
244  DF  .~ Inclined wheels
244.1  DF  .~ Furrow feelers
245  DF  .~ Guide rollers
246  DF  .~.~ Rail interlock
247  DF  .~.~ Horizontal thrust only
248  DF  .~ Rail-interlocking lugs
249  DF  CAR STOPS
250  DF  .~ Special track
251  DF  .~.~ Car retaining
252  DF  .~ Releasable feed
253  DF  .~.~ Alternate
254  DF  .~ Bumpers
255  DF  .~.~ Counterweight
256  DF  .~.~ Fluid pressure
257  DF  .~ Displaceable chock
258  DF  .~ Rail-clamp chocks
259  DF  .~ Sliding
260  DF  .~ Wheel skid
261  DF  CAR-ATTACHED DERAILER
262  DF  CAR REPLACER
263  DF  .~ Car attached
264  DF  .~ Special track
265  DF  .~ Two-way
266  DF  .~.~ With rollers
267  DF  .~.~ Double
268  DF  .~ One way
269  DF  .~.~ Symmetrical
270  DF  .~.~ Saddles
271  DF  .~.~ Pivoted ramp
272  DF  .~ Articulated extension
273  DF  .~ Shifting jack
274  DF  .~ Rail clamps
275  DF  HOSE BRIDGES
276  DF  .~ Overhead
277  DF  .~ Under rail
279  DF  TRACK CLEARERS
280  DF  .~ Conduit
306  DF  WITH RUNNING GEAR
307  DF  MISCELLANEOUS
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DIGEST
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DIG 1  DD  Toy railroad