- 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: 743
10-year publication summary
|
71
|
83
|
75
|
76
|
43
|
41
|
24
|
28
|
10
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 10128 |
128 |
| General Electric Company | 13910 |
28 |
| Safran Aircraft Engines | 6704 |
27 |
| Stein Seal Company | 66 |
25 |
| Siemens AG | 24020 |
24 |
| Eagle Industry Co., Ltd. | 1178 |
22 |
| NOK Corporation | 2304 |
20 |
| Mitsubishi Heavy Industries, Ltd. | 9139 |
19 |
| Rolls-Royce Corporation | 1677 |
19 |
| GE Infrastructure Technology, LLC | 6165 |
17 |
| Nuovo Pignone Tecnologie S.r.l. | 1219 |
15 |
| Siemens Energy, Inc. | 1684 |
14 |
| Siemens Energy Global GmbH & Co. KG | 3357 |
12 |
| Pratt & Whitney Canada Corp. | 5506 |
11 |
| Aktiebolaget SKF | 3130 |
9 |
| Mitsubishi Heavy Industries Compressor Corporation | 643 |
9 |
| Mitsubishi Power, Ltd. | 1834 |
9 |
| Polymer Concepts Technologies Pby, Inc. | 35 |
9 |
| Ebara Corporation | 2329 |
8 |
| Cross Manufacturing Company (1938) Limited | 30 |
8 |
| Other owners | 310 |