CPC Main Group
F22B 37/00 Component parts or details of steam boilers
8 direct subcodes
Child Classifications
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- F22B 37/02 applicable to more than one kind or type of steam boiler
- F22B 37/60 specially adapted for steam boilers of instantaneous or flash type
- F22B 37/62 specially adapted for steam boilers of forced-flow type
- F22B 37/76 Adaptations or mounting of devices for observing existence or direction of fluid flow
- F22B 37/78 Adaptations or mounting of level indicators
Top Applicants
Top 10 applicants by patent filingsfor class F22, 2013–2023, worldwide · Source: EPO PATSTAT
- XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 544
- SIEMENS DE 306
- PHILIP MORRIS PRODUCTS CH 258
- GENERAL ELECTRIC TECHNOLOGY CH 254
- MITSUBISHI HITACHI POWER SYSTEMS JP 235
- XIAN JIAOTONG UNIVERSITY 214
- MITSUBISHI HEAVY INDUSTRIES JP 195
- MITSUBISHI HITACHI POWER SYSTEMS 169
- HARBIN BOILER COMPANY 166
- VALMET TECHNOLOGIES FI 155