CPC Main Group
G01K 11/00 Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
11 direct subcodes
Child Classifications
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- G01K 11/02 using evaporation or sublimation, e.g. by observing boiling
- G01K 11/06 using melting, freezing, or softening
- G01K 11/10 using sintering
- G01K 11/12 using changes in colour, translucency or reflectance
- G01K 11/20 using thermoluminescent materials (G01K11/32 takes precedence)
- G01K 11/22 using measurement of acoustic effects
- G01K 11/28 using measurements of density
- G01K 11/30 using measurement of the effect of a material on X-radiation, gamma radiation or particle radiation
- G01K 11/32 using changes in transmittance, scattering or luminescence in optical fibres
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