DIFF Main Group
G01B 3/00 Measuring instruments characterised by the use of mechanical techniques
Introduced: September 1968
Of 15 combined children, 14 exist in both systems.
1 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01B 3/02 Rulers with scales or marks for direct reading (measuring tapes G01B3/10) IPC+CPC Available in IPC and CPC
- G01B 3/22 Feeler-pin gauges, e.g. dial gauges (for measuring contours or curvatures G01B5/20) IPC+CPC Available in IPC and CPC
- G01B 3/30 Bars, blocks, or strips in which the distance between a pair of faces is fixed, although it may be preadjustable, e.g. end measure, feeler strip +1 CPC IPC+CPC Available in IPC and CPC
- G01B 3/38 Gauges with an open yoke and opposed faces, i.e. calipers, in which the internal distance between the faces is fixed, although it may be preadjustable IPC+CPC Available in IPC and CPC
- G01B 3/46 Plug gauges for internal dimensions with engaging surfaces which are at a fixed distance, although they may be preadjustable IPC+CPC Available in IPC and CPC
- G01B 3/56 Gauges for measuring angles or tapers, e.g. conical calipers +2 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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