Members preventing rotation of rings in grooves

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Piston-rings, seats therefor; Ring sealings of similar construction in general > Details > Members preventing rotation of rings in grooves

CPC:

Piston-rings , seats therefor; Ring sealings of similar construction (other sealings between pistons and cylinders F16J3/06, F16J15/16 ; tools for mounting or removing piston-rings or the like B25B; piston sealing arrangements on brake master cylinders B60T11/236 ) > Details > Members preventing rotation of rings in grooves

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

SCHAEFFLER TECHNOLOGIES & COMPANY DE 21,545
ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
TOYOTA MOTOR CORPORATION 7,215
HYUNDAI MOTOR COMPANY KR 6,846
ROBERT BOSCH DE 6,106
NTN CORPORATION 5,305
SKF SE 4,219
KIA MOTORS CORPORATION KR 3,852
NSK 3,850
HONDA MOTOR COMPANY 3,639

Top Applicants (CPC)

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
HYUNDAI MOTOR COMPANY KR 7,933
ROBERT BOSCH DE 7,059
KIA MOTORS CORPORATION KR 4,867
SKF SE 4,729
TOYOTA MOTOR CORPORATION JP 4,111
FORD GLOBAL TECHNOLOGIES US 3,838
GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
TOYOTA MOTOR CORPORATION 3,499