• All sections
• G - Physics
• G01L - Measuring force, stress, torque, work, mechanical power, mechanical efficiency, or fluid pressure
• G01L 23/22 - Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines

Patent holdings for IPC class G01L 23/22

Total number of patents in this class: 441

10-year publication summary

Principal owners for this class