DIFF Subgroup
F15C 1/10 for digital operation, e.g. to form a logical flip-flop, OR-gate, NOR-gate
Introduced: September 1968
Full Title
Circuit elements having no moving parts > Boundary-layer devices, e.g. wall-attachment amplifiers > for digital operation, e.g. to form a logical flip-flop, OR-gate, NOR-gate
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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- F15C 1/12 Multiple arrangements thereof for performing operations of the same kind, e.g. majority gates, identity gates IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F15,2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 1,079
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 980
- SMC CORPORATION JP 737
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 674
- KYB CORPORATION JP 525
- CATERPILLAR US 461
- FESTO & COMPANY DE 451
- ZHEJIANG UNIVERSITY 448
- HITACHI CONSTRUCTION MACHINERY COMPANY 442
- XUZHOU HEAVY MACHINERY COMPANY 404
Top Applicants (CPC)
Class F15,2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 1,281
- SMC CORPORATION JP 865
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
- KYB CORPORATION JP 584
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
- CATERPILLAR US 532
- FESTO & COMPANY DE 486
- JOHN DEERE US 419
- KAWASAKI HEAVY IND JP 368
- HAMILTON SUNDSTRAND US 368