F01D 1/34 characterised by non-bladed rotor, e.g. with drilled holes (F01D1/32 takes precedence; sirens G10K7/00 )
Introduced: September 1968
Title
Titles differ between systems:
IPC: characterised by non-bladed rotor, e.g. with drilled holes
CPC: characterised by non-bladed rotor, e.g. with drilled holes (F01D1/32 takes precedence; sirens G10K7/00 )
Full Title
Full titles differ between systems:
Non-positive-displacement machines or engines, e.g. steam turbines > characterised by non-bladed rotor, e.g. with drilled holes
Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K) > characterised by non-bladed rotor, e.g. with drilled holes (F01D1/32 takes precedence; sirens G10K7/00 )
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class F01,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 8,496
- UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
- SAFRAN AIRCRAFT ENGINES FR 5,503
- TOYOTA MOTOR CORPORATION 4,556
- SIEMENS DE 3,992
- HYUNDAI MOTOR COMPANY KR 3,929
- RAYTHEON TECHNOLOGIES CORPORATION US 3,534
- FORD GLOBAL TECHNOLOGIES US 3,407
- TOYOTA MOTOR CORPORATION JP 3,042
- WEICHAI POWER COMPANY 2,888
Top Applicants (CPC)
Class F01,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 9,989
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
- SAFRAN AIRCRAFT ENGINES FR 6,248
- HYUNDAI MOTOR COMPANY KR 4,530
- SIEMENS DE 4,461
- FORD GLOBAL TECHNOLOGIES US 4,029
- RAYTHEON TECHNOLOGIES CORPORATION US 3,947
- TOYOTA MOTOR CORPORATION JP 3,734
- GE (GENERAL ELECTRIC COMPANY) 3,415
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063