US Patent Class 73
MEASURING AND TESTING-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
7  DF  BY ABRASION, MILLING, RUBBING, OR SCUFFING {1}
9  DF  FRICTIONAL RESISTANCE, COEFFICIENT OR CHARACTERISTICS {1}
11.01  DF  TESTING IMPACT DELIVERING DEVICE (E.G., A HAMMER) {2}
11.04  DF  TESTING OF SHOCK ABSORBING DEVICE (E.G., AUTOMOBILE SHOCK ABSORBER, GUN RECOIL APPARATUS, ETC.) {4}
12.01  DF  TESTING BY IMPACT OR SHOCK {5}
19.01  DF  GAS CONTENT OF A LIQUID OR A SOLID {9}
23.2  DF  GAS ANALYSIS {15}
32 R  DF  SPECIFIC GRAVITY OR DENSITY OF LIQUID OR SOLID {7}
35.01  DF  ENGINE DETONATION (E.G., KNOCK) {4}
35.14  DF  EXPLOSIVE {3}
36  DF  ILLUMINATING FLUID
37  DF  WITH FLUID PRESSURE {8}
52  DF  TESTING SEALED RECEPTACLE
53.01  DF  LIQUID ANALYSIS OR ANALYSIS OF THE SUSPENSION OF SOLIDS IN A LIQUID {15}
65.01  DF  CENTER OF GRAVITY; TURNING MOMENT; METACENTRIC HEIGHT {6}
66  DF  ROTOR UNBALANCE {7}
570  DF  VIBRATION {10}
73  DF  MOISTURE CONTENT OR ABSORPTION CHARACTERISTIC OF MATERIAL {4}
78  DF  HARDNESS {2}
86  DF  EMBRITTLEMENT OR EROSION
87  DF  DUCTILITY OR BRITTLENESS
760  DF  SPECIMEN STRESS OR STRAIN, OR TESTING BY STRESS OR STRAIN APPLICATION {12}
104  DF  SURFACE AND CUTTING EDGE TESTING {1}
112  DF  POWER PLANT OR UNIT EFFICIENCY {2}
116  DF  MOTOR AND ENGINE TESTING {6}
121  DF  BRAKE TESTING {6}
862  DF  DYNAMOMETERS {5}
146  DF  TIRE, TREAD OR ROADWAY {1}
147  DF  WIND TUNNEL: AERODYNAMIC WING AND PROPELLER STUDY
148  DF  MODEL BASIN AND TESTING TANK
149  DF  VOLUMETRIC CONTENT MEASURING
150 R  DF  COATING MATERIAL: INK ADHESIVE AND/OR PLASTIC {1}
152.01  DF  BOREHOLE OR DRILLING (E.G., DRILL LOADING FACTOR, DRILLING RATE, RATE OF FLUID FLOW) {6}
156  DF  STATISTICAL RECORD VERIFYING
157  DF  RECORD STRIP SPROCKET HOLE TESTING
158  DF  HOISTING CABLE AND ROPE
159  DF  SHEET, WOVEN FABRIC OR FIBER {1}
161  DF  SPRING TESTING
162  DF  TOOTHED GEAR
163  DF  COIN
164  DF  MINER'S LAMP
167  DF  ORDNANCE AND PROJECTILE
168  DF  BLOWER, PUMP, AND HYDRAULIC EQUIPMENT
169  DF  FLOUR, DOUGH, OR BREAD
172  DF  ORTHOPEDIC PRESSURE DISTRIBUTION
178 R  DF  NAVIGATION {5}
170.01  DF  FLUID FLOW DIRECTION (E.G., WIND SOCK, WEATHER VANE, ETC.) {4}
170.16  DF  METEOROLOGY {6}
170.29  DF  OCEANOLOGY (E.G., OCEANS, RIVERS, OR LAKES) {4}
861  DF  VOLUME OR RATE OF FLOW {23}
290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
379.01  DF  MUSCULAR FORCE (E.G., STRENGTH TESTING, EXERCISING OR TRAINING EFFORT, ETC.) {5}
382 R  DF  GRAVITATIONAL DETERMINATION {2}
488  DF  SPEED, VELOCITY, OR ACCELERATION {29}
384  DF  BAROMETER (E.G., ALTIMETER) {2}
700  DF  FLUID PRESSURE GAUGE {20}
863  DF  SAMPLER, SAMPLE HANDLING, ETC. {11}
426  DF  MEASURING VESSEL {2}
430  DF  INSTRUMENT MECHANISM DAMPENING
431  DF  INSTRUMENT CASING
865  DF  MASS
865.1  DF  HUMAN STRESS LIMIT (E.G., DECOMPRESSION GAUGE FOR DIVERS)
865.2  DF  HYDRAULIC ALTIMETER
865.3  DF  TESTING BY IMPARTING MOTION
865.4  DF  ANALYZING BODILY MOVEMENT (E.G., SKILLS OR KINETICS OF HANDWRITING)
865.5  DF  PARTICLE SIZE
865.6  DF  SIMULATED ENVIRONMENT (E.G., TEST CHAMBERS)
865.7  DF  TOUCH OR TASTE
865.8  DF  INSPECTING
865.9  DF  TESTING OF APPARATUS
866  DF  TESTING OF MATERIAL
866.1  DF  INSTRUMENT MECHANISM OR TRANSMISSION {1}
866.3  DF  DISPLAY OR DISPLAY DEVICE DETAILS
866.4  DF  SPECIMEN MODEL OR ANALOG
866.5  DF  PROBE OR PROBE MOUNTING
432.1  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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900  DF  AUTOMATIC GAIN CONTROL
901  DF  DIGITAL READOUT
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DIGESTS
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DIG 1  DF  Vibration
DIG 2  DF  Magnetostrictive
DIG 3  DF  Hall effect
DIG 4  DF  Piezoelectric
DIG 5  DF  Liquid levels with magnetic transmission
DIG 8  DF  Fluid circuits
DIG 9  DF  Molten metal samplers
DIG 10  DF  Instrument mechanisms with acceleration compensation
DIG 11  DF  Photoelectric cell
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FOREIGN ART COLLECTIONS
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FOR 100  DF  BORE HOLE AND DRILLING STUDY (73/151) {3}