DIFF Subgroup
G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
Introduced: January 1980
Full Title
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified > Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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- G01S 13/75 using transponders powered from received waves, e.g. using passive transponders since 1995 +1 CPC IPC+CPC Available in IPC and CPC
- G01S 13/76 wherein pulse-type signals are transmitted since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- G01S 13/79 Systems using random coded signals or random pulse repetition frequencies since 1995 IPC+CPC Available in IPC and CPC
- G01S 13/82 wherein continuous-type signals are transmitted since 1980 +1 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