CPC Main Group
F23H 9/00 Revolving-grates; Rocking or shaking grates (inclined grates F23H7/00)
5 direct subcodes
Child Classifications
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- F23H 9/02 Revolving cylindrical grates
- F23H 9/04 Grates rocked as a whole
- F23H 9/06 the bars being rocked about axes transverse to their lengths
- F23H 9/08 the bars being rocked about their longitudinal axes (inclined grates with movable bars disposed parallel to the direction of fuel feeding and rocking about their axes F23H7/10)
- F23H 9/12 the bars being vertically movable in a plane
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