DIFF Subgroup
F02M 35/02 Air cleaners
Introduced: September 1968
Full Title
Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines > Air cleaners
Of 9 combined children, 5 exist in both systems.
4 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F02M 35/022 acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls since 1974 +2 CPC IPC+CPC Available in IPC and CPC
- F02M 35/024 using filters, e.g. moistened (F02M35/026 takes precedence; cleaning of the filtering material F02M35/08) since 1974 +4 CPC IPC+CPC Available in IPC and CPC
- F02M 35/026 acting by guiding the air over or through an oil or other liquid bath, e.g. combined with filters since 1974 IPC+CPC Available in IPC and CPC
- F02M 35/04 specially arranged with respect to engine ; Mounting thereon +3 CPC IPC+CPC Available in IPC and CPC
- F02M 35/08 with means for removing dust, from cleaners; with means for indicating clogging; with by-pass means; +4 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F02,2013–2023, worldwide · Source: EPO PATSTAT
- TOYOTA MOTOR CORPORATION 8,687
- ROBERT BOSCH DE 8,328
- FORD GLOBAL TECHNOLOGIES US 7,423
- GE (GENERAL ELECTRIC COMPANY) US 5,732
- UNITED TECHNOLOGIES CORPORATION (UTC) US 5,592
- HYUNDAI MOTOR COMPANY KR 4,699
- TOYOTA MOTOR CORPORATION JP 4,541
- DENSO CORPORATION 3,711
- WEICHAI POWER COMPANY 3,486
- SAFRAN AIRCRAFT ENGINES FR 3,249
Top Applicants (CPC)
Class F02,2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 8,801
- FORD GLOBAL TECHNOLOGIES US 8,171
- GE (GENERAL ELECTRIC COMPANY) US 6,957
- HYUNDAI MOTOR COMPANY KR 5,390
- UNITED TECHNOLOGIES CORPORATION (UTC) US 5,250
- TOYOTA MOTOR CORPORATION JP 5,214
- TOYOTA MOTOR CORPORATION 4,149
- DENSO CORPORATION JP 3,400
- KIA MOTORS CORPORATION KR 3,388
- SAFRAN AIRCRAFT ENGINES FR 3,332