IPC Subgroup
G01P 3/36 Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
Introduced: September 1968
Last revised: January 2006
Full Title
Measuring linear or angular speed; Measuring differences of linear or angular speeds > Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT; INDICATING DIRECTION OF MOVEMENT
Additional Content
Optical devices for sensing speed or position of dynamo-electric machines, or actuated thereby
2 direct subcodes
Child Classifications
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Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 41,447
- CHINESE ACADEMY OF SCIENCES 32,952
- ROBERT BOSCH DE 16,470
- SAMSUNG ELECTRONICS COMPANY KR 10,052
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
- ZHEJIANG UNIVERSITY 9,529
- GUANGDONG POWER GRID CORPORATION 8,615
- TSINGHUA UNIVERSITY 7,805
- HALLIBURTON ENERGY SERVICES GROUP US 7,796
- QUALCOMM US 7,171