CPC Subgroup
G01L 21/10 by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
Full Title
Vacuum gauges > by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
2 direct subcodes
Child Classifications
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- G01L 21/12 measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
- G01L 21/14 using thermocouples
Top Applicants
Top 10 applicants by patent filingsfor class G01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 21,460
- ROBERT BOSCH DE 17,801
- SGCC(STATE GRID CORPORATION OF CHINA) 17,347
- SAMSUNG ELECTRONICS COMPANY KR 13,192
- QUALCOMM US 9,900
- HALLIBURTON ENERGY SERVICES GROUP US 9,742
- PHILIPS ELECTRONICS NL 7,249
- MITSUBISHI ELECTRIC CORPORATION JP 6,503
- ZHEJIANG UNIVERSITY 6,414
- DENSO CORPORATION JP 6,382