CPC Subgroup
F23Q 9/12 to permit the supply to the main burner in dependence upon existence of pilot flame
Full Title
Pilot flame igniters > with interlock with main fuel supply > to permit the supply to the main burner in dependence upon existence of pilot flame
1 direct subcode
Child Classifications
Navigate with arrow keys, Enter to open
- F23Q 9/14 using electric means, e.g. by light-sensitive elements
Top Applicants
Top 10 applicants by patent filingsfor class F23, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 2,581
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,180
- SIEMENS DE 1,157
- GE (GENERAL ELECTRIC COMPANY) 994
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 769
- MITSUBISHI HEAVY INDUSTRIES JP 701
- MITSUBISHI HITACHI POWER SYSTEMS JP 695
- RAYTHEON TECHNOLOGIES CORPORATION US 587
- NINGBO FOTILE KITCHENWARE COMPANY 543
- GENERAL ELECTRIC TECHNOLOGY CH 490