CPC Subgroup Additional Only
F05D 2220/3216 for a special compressor stage
Full Title
Application > in turbines > in gas turbines > for a special turbine stage > for a special compressor stage
3 direct subcodes
Child Classifications
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- F05D 2220/3217 for the first stage of a compressor or a low pressure compressor
- F05D 2220/3218 for an intermediate stage of a compressor
- F05D 2220/3219 for the last stage of a compressor or a high pressure compressor
Top Applicants
Top 10 applicants by patent filingsfor class F05, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 12,002
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,736
- SAFRAN AIRCRAFT ENGINES FR 6,804
- RAYTHEON TECHNOLOGIES CORPORATION US 4,530
- SIEMENS DE 4,371
- GE (GENERAL ELECTRIC COMPANY) 3,686
- ROLLS-ROYCE GB 3,594
- PRATT & WHITNEY CANADA CORPORATION CA 3,415
- VESTAS DK 3,076
- WOBBEN PROPERTIES DE 2,614