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[Search a list of Patent Appplications for class 73]  Class   73MEASURING AND TESTING
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   [List of Patents for class 73 subclass 1.01]  1.01           INSTRUMENT PROVING OR CALIBRATING
   [List of Patents for class 73 subclass 1.02]  1.02           Subclass 1.02 indent level is 1 Gas or liquid analyzer
   [List of Patents for class 73 subclass 1.03]  1.03           Subclass 1.03 indent level is 2 Reference standard
   [List of Patents for class 73 subclass 1.06]  1.06           Subclass 1.06 indent level is 2 Gas
    [List of Patents for class 73 subclass 1.07]  1.07           Subclass 1.07 indent level is 3 Span or zero
   [List of Patents for class 73 subclass 1.08]  1.08           Subclass 1.08 indent level is 1 Dynamometer
   [List of Patents for class 73 subclass 1.09]  1.09           Subclass 1.09 indent level is 2 Torque
    [List of Patents for class 73 subclass 1.11]  1.11           Subclass 1.11 indent level is 3 Electrical
    [List of Patents for class 73 subclass 1.12]  1.12           Subclass 1.12 indent level is 3 Wrench
    [List of Patents for class 73 subclass 1.13]  1.13           Subclass 1.13 indent level is 2 Weight
    [List of Patents for class 73 subclass 1.14]  1.14           Subclass 1.14 indent level is 2 Rotor unbalance or a roller having a smooth surface
    [List of Patents for class 73 subclass 1.15]  1.15           Subclass 1.15 indent level is 2 Load cell (e.g., strain gauge or piezoelectric sensor)
   [List of Patents for class 73 subclass 1.16]  1.16           Subclass 1.16 indent level is 1 Volume of flow, speed of flow, volume rate of flow, or mass rate of flow
    [List of Patents for class 73 subclass 1.17]  1.17           Subclass 1.17 indent level is 2 Plug with leak detector
    [List of Patents for class 73 subclass 1.18]  1.18           Subclass 1.18 indent level is 2 Sphere
   [List of Patents for class 73 subclass 1.19]  1.19           Subclass 1.19 indent level is 2 Piston
    [List of Patents for class 73 subclass 1.21]  1.21           Subclass 1.21 indent level is 3 With plural pistons
    [List of Patents for class 73 subclass 1.22]  1.22           Subclass 1.22 indent level is 3 With magnetic or optical sensor
    [List of Patents for class 73 subclass 1.23]  1.23           Subclass 1.23 indent level is 3 With position sensing switch
    [List of Patents for class 73 subclass 1.24]  1.24           Subclass 1.24 indent level is 2 Tracer
   [List of Patents for class 73 subclass 1.25]  1.25           Subclass 1.25 indent level is 2 Orifice or restriction
    [List of Patents for class 73 subclass 1.26]  1.26           Subclass 1.26 indent level is 3 Nozzle or venturi
   [List of Patents for class 73 subclass 1.27]  1.27           Subclass 1.27 indent level is 2 Turbine, geared meter, pulse activated, or counter
    [List of Patents for class 73 subclass 1.28]  1.28           Subclass 1.28 indent level is 3 Turbine or geared meter
    [List of Patents for class 73 subclass 1.29]  1.29           Subclass 1.29 indent level is 2 Anemometer or pitot tube
   [List of Patents for class 73 subclass 1.31]  1.31           Subclass 1.31 indent level is 2 With liquid level monitor or timer
    [List of Patents for class 73 subclass 1.32]  1.32           Subclass 1.32 indent level is 3 Prover bell
    [List of Patents for class 73 subclass 1.33]  1.33           Subclass 1.33 indent level is 2 With floating element or weighing
    [List of Patents for class 73 subclass 1.34]  1.34           Subclass 1.34 indent level is 2 With signal processing, span or set point adjustment (e.g., zero correction)
    [List of Patents for class 73 subclass 1.35]  1.35           Subclass 1.35 indent level is 2 With pressure measurement or plural flowmeters
    [List of Patents for class 73 subclass 1.36]  1.36           Subclass 1.36 indent level is 2 Metering dispenser
   [List of Patents for class 73 subclass 1.37]  1.37           Subclass 1.37 indent level is 1 Speed, velocity, or acceleration
   [List of Patents for class 73 subclass 1.38]  1.38           Subclass 1.38 indent level is 2 Acceleration utilizing an inertial element
    [List of Patents for class 73 subclass 1.39]  1.39           Subclass 1.39 indent level is 3 Involving pendulum or impact
    [List of Patents for class 73 subclass 1.41]  1.41           Subclass 1.41 indent level is 2 Optical or magnetic sensing
   [List of Patents for class 73 subclass 1.42]  1.42           Subclass 1.42 indent level is 1 Timing apparatus (e.g., fuse, camera, or shutter)
   [List of Patents for class 73 subclass 1.43]  1.43           Subclass 1.43 indent level is 2 Chronometer (e.g., clock, watch, or watch unbalance)
    [List of Patents for class 73 subclass 1.44]  1.44           Subclass 1.44 indent level is 3 Using antenna or radio frequency (RF)
   [List of Patents for class 73 subclass 1.45]  1.45           Subclass 1.45 indent level is 3 Using optical sensor or element
    [List of Patents for class 73 subclass 1.46]  1.46           Subclass 1.46 indent level is 4 With sound sensor
    [List of Patents for class 73 subclass 1.47]  1.47           Subclass 1.47 indent level is 4 Resilient element
   [List of Patents for class 73 subclass 1.48]  1.48           Subclass 1.48 indent level is 3 Using sound sensor or piezoelectric vibration sensor
    [List of Patents for class 73 subclass 1.49]  1.49           Subclass 1.49 indent level is 4 Plural watches or plural sensors
    [List of Patents for class 73 subclass 1.51]  1.51           Subclass 1.51 indent level is 4 Resilient element
    [List of Patents for class 73 subclass 1.52]  1.52           Subclass 1.52 indent level is 3 Plural watches
   [List of Patents for class 73 subclass 1.53]  1.53           Subclass 1.53 indent level is 3 With resilient element
   [List of Patents for class 73 subclass 1.54]  1.54           Subclass 1.54 indent level is 4 Coil spring
    [List of Patents for class 73 subclass 1.55]  1.55           Subclass 1.55 indent level is 5 Plural coil springs
    [List of Patents for class 73 subclass 1.56]  1.56           Subclass 1.56 indent level is 2 Optical instrument (e.g., camera shutter) or optical sensor
   [List of Patents for class 73 subclass 1.57]  1.57           Subclass 1.57 indent level is 1 Fluid pressure
    [List of Patents for class 73 subclass 1.58]  1.58           Subclass 1.58 indent level is 2 Vacuum
   [List of Patents for class 73 subclass 1.59]  1.59           Subclass 1.59 indent level is 2 With signal correction or processing
    [List of Patents for class 73 subclass 1.61]  1.61           Subclass 1.61 indent level is 3 Span
    [List of Patents for class 73 subclass 1.62]  1.62           Subclass 1.62 indent level is 3 Zero
   [List of Patents for class 73 subclass 1.63]  1.63           Subclass 1.63 indent level is 3 With reference source or attachment therefor
    [List of Patents for class 73 subclass 1.64]  1.64           Subclass 1.64 indent level is 4 Varying
    [List of Patents for class 73 subclass 1.65]  1.65           Subclass 1.65 indent level is 2 Dead weight type
   [List of Patents for class 73 subclass 1.66]  1.66           Subclass 1.66 indent level is 2 Varying
    [List of Patents for class 73 subclass 1.67]  1.67           Subclass 1.67 indent level is 3 Using or containing liquid
    [List of Patents for class 73 subclass 1.68]  1.68           Subclass 1.68 indent level is 2 With piston and cylinder
    [List of Patents for class 73 subclass 1.69]  1.69           Subclass 1.69 indent level is 2 Using or containing liquid
   [List of Patents for class 73 subclass 1.71]  1.71           Subclass 1.71 indent level is 2 Pressure activated device
    [List of Patents for class 73 subclass 1.72]  1.72           Subclass 1.72 indent level is 3 Valve
   [List of Patents for class 73 subclass 1.73]  1.73           Subclass 1.73 indent level is 1 Liquid level or volume measuring apparatus
    [List of Patents for class 73 subclass 1.74]  1.74           Subclass 1.74 indent level is 2 Volumetric dispenser (e.g., pipette)
   [List of Patents for class 73 subclass 1.75]  1.75           Subclass 1.75 indent level is 1 Angle, direction, or inclination
    [List of Patents for class 73 subclass 1.76]  1.76           Subclass 1.76 indent level is 2 Compass
    [List of Patents for class 73 subclass 1.77]  1.77           Subclass 1.77 indent level is 2 Gyroscope
    [List of Patents for class 73 subclass 1.78]  1.78           Subclass 1.78 indent level is 2 Aircraft, inertial navigation, or attitude
   [List of Patents for class 73 subclass 1.79]  1.79           Subclass 1.79 indent level is 1 Displacement, motion, distance, or position
    [List of Patents for class 73 subclass 1.81]  1.81           Subclass 1.81 indent level is 2 Length, width, or height
   [List of Patents for class 73 subclass 1.82]  1.82           Subclass 1.82 indent level is 1 Apparatus for measuring by use of vibration or apparatus for measuring vibration (e.g., acoustic or ultrasonic)
    [List of Patents for class 73 subclass 1.83]  1.83           Subclass 1.83 indent level is 2 Liquid
    [List of Patents for class 73 subclass 1.84]  1.84           Subclass 1.84 indent level is 2 Rotary or rotor unbalance
    [List of Patents for class 73 subclass 1.85]  1.85           Subclass 1.85 indent level is 2 Seismic (e.g., geophone) or with optical sensor
    [List of Patents for class 73 subclass 1.86]  1.86           Subclass 1.86 indent level is 2 Reference standard detail
    [List of Patents for class 73 subclass 1.87]  1.87           Subclass 1.87 indent level is 1 Centrifuge
    [List of Patents for class 73 subclass 1.88]  1.88           Subclass 1.88 indent level is 1 Span or set point adjustment (e.g., zero correction)
    [List of Patents for class 73 subclass 1.89]  1.89           Subclass 1.89 indent level is 1 Roughness or hardness
   [List of Patents for class 73 subclass 7]  7           BY ABRASION, MILLING, RUBBING, OR SCUFFING
    [List of Patents for class 73 subclass 8]  8           Subclass 8 indent level is 1 Wheel tread, tire, track, or roadway
   [List of Patents for class 73 subclass 9]  9           FRICTIONAL RESISTANCE, COEFFICIENT OR CHARACTERISTICS
    [List of Patents for class 73 subclass 10]  10           Subclass 10 indent level is 1 Lubricant testing
   [List of Patents for class 73 subclass 11.01]  11.01           TESTING IMPACT DELIVERING DEVICE (E.G., A HAMMER)
    [List of Patents for class 73 subclass 11.02]  11.02           Subclass 11.02 indent level is 1 Shot peener
    [List of Patents for class 73 subclass 11.03]  11.03           Subclass 11.03 indent level is 1 Pile driving hammer
   [List of Patents for class 73 subclass 11.04]  11.04           TESTING OF SHOCK ABSORBING DEVICE (E.G., AUTOMOBILE SHOCK ABSORBER, GUN RECOIL APPARATUS, ETC.)
    [List of Patents for class 73 subclass 11.05]  11.05           Subclass 11.05 indent level is 1 Torsional vibration damper
    [List of Patents for class 73 subclass 11.06]  11.06           Subclass 11.06 indent level is 1 Railway draft gear
   [List of Patents for class 73 subclass 11.07]  11.07           Subclass 11.07 indent level is 1 In situ vehicle suspension
    [List of Patents for class 73 subclass 11.08]  11.08           Subclass 11.08 indent level is 2 By applying reciprocating or oscillating motion
    [List of Patents for class 73 subclass 11.09]  11.09           Subclass 11.09 indent level is 1 By applying reciprocating or oscillating motion
   [List of Patents for class 73 subclass 12.01]  12.01           TESTING BY IMPACT OR SHOCK
    [List of Patents for class 73 subclass 12.02]  12.02           Subclass 12.02 indent level is 1 Resilient ball (e.g., golf ball, baseball, etc.)
    [List of Patents for class 73 subclass 12.03]  12.03           Subclass 12.03 indent level is 1 Typewriting ribbon or carbon paper
   [List of Patents for class 73 subclass 12.04]  12.04           Subclass 12.04 indent level is 1 Accelerated or decelerated specimen (e.g., propelled or dropped specimen support carriage)
    [List of Patents for class 73 subclass 12.05]  12.05           Subclass 12.05 indent level is 2 Particle or projectile specimen
    [List of Patents for class 73 subclass 12.06]  12.06           Subclass 12.06 indent level is 2 Dropped
    [List of Patents for class 73 subclass 12.07]  12.07           Subclass 12.07 indent level is 2 By hydraulic or pneumatic forces
    [List of Patents for class 73 subclass 12.08]  12.08           Subclass 12.08 indent level is 1 Specimen directly subjected to a fluid pressure pulse or wave
   [List of Patents for class 73 subclass 12.09]  12.09           Subclass 12.09 indent level is 1 Specimen impactor detail
    [List of Patents for class 73 subclass 12.11]  12.11           Subclass 12.11 indent level is 2 Particle or projectile
    [List of Patents for class 73 subclass 12.12]  12.12           Subclass 12.12 indent level is 2 Reciprocating or oscillating
   [List of Patents for class 73 subclass 12.13]  12.13           Subclass 12.13 indent level is 2 Dropped
    [List of Patents for class 73 subclass 12.14]  12.14           Subclass 12.14 indent level is 3 Pivoted