- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 15/44 - Free-space packings
Patent holdings for IPC class F16J 15/44
Total number of patents in this class: 735
10-year publication summary
|
77
|
69
|
80
|
71
|
74
|
41
|
40
|
22
|
26
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 9445 |
124 |
| General Electric Company | 13859 |
29 |
| Safran Aircraft Engines | 6306 |
26 |
| Stein Seal Company | 67 |
26 |
| Siemens AG | 24386 |
24 |
| Eagle Industry Co., Ltd. | 1133 |
21 |
| NOK Corporation | 2229 |
20 |
| Rolls-Royce Corporation | 1760 |
19 |
| Mitsubishi Heavy Industries, Ltd. | 8787 |
17 |
| GE Infrastructure Technology, LLC | 6248 |
17 |
| Siemens Energy, Inc. | 1708 |
14 |
| Nuovo Pignone Tecnologie S.r.l. | 998 |
14 |
| Siemens Energy Global GmbH & Co. KG | 3020 |
11 |
| Pratt & Whitney Canada Corp. | 4818 |
10 |
| Kaydon Ring & Seal, Inc. | 20 |
10 |
| Aktiebolaget SKF | 2983 |
9 |
| Cross Manufacturing Company (1938) Limited | 32 |
9 |
| Mitsubishi Heavy Industries Compressor Corporation | 634 |
9 |
| Mitsubishi Power, Ltd. | 1783 |
9 |
| Ebara Corporation | 2188 |
8 |
| Other owners | 309 |