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DIFF Subgroup
F16F 3/06

of which some are placed around others in such a way that they damp each other by mutual friction

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic > with springs made of steel or of other material having low internal friction > composed only of wound springs > of which some are placed around others in such a way that they damp each other by mutual friction

CPC:

Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic ( ; if including fluid springs F16F5/00, F16F13/00) > with springs made of steel or of other material having low internal friction > composed only of wound springs > of which some are placed around others in such a way that they damp each other by mutual friction

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

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

Top Applicants (CPC)

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

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