- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 15/44 - Free-space packings
Patent holdings for IPC class F16J 15/44
Total number of patents in this class: 719
10-year publication summary
|
51
|
81
|
71
|
83
|
75
|
75
|
42
|
37
|
19
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rtx Corporation | 8674 |
123 |
| General Electric Company | 18133 |
27 |
| Stein Seal Company | 69 |
26 |
| Siemens AG | 24990 |
25 |
| Eagle Industry Co., Ltd. | 1062 |
21 |
| NOK Corporation | 2108 |
20 |
| Safran Aircraft Engines | 5739 |
20 |
| Rolls-Royce Corporation | 1686 |
19 |
| Siemens Energy, Inc. | 1770 |
17 |
| GE Infrastructure Technology, LLC | 5873 |
17 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
15 |
| Nuovo Pignone Tecnologie S.r.l. | 789 |
13 |
| Pratt & Whitney Canada Corp. | 4215 |
10 |
| Kaydon Ring & Seal, Inc. | 20 |
10 |
| Mitsubishi Power, Ltd. | 1680 |
10 |
| Siemens Energy Global GmbH & Co. KG | 2775 |
10 |
| Mitsubishi Heavy Industries Compressor Corporation | 613 |
9 |
| Ebara Corporation | 1951 |
8 |
| Aktiebolaget SKF | 2700 |
8 |
| Cross Manufacturing Company (1938) Limited | 28 |
8 |
| Other owners | 303 |