- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F16J - Pistonscylinderspressure vessels in generalsealings
- F16J 15/447 - Labyrinth packings
Patent holdings for IPC class F16J 15/447
Total number of patents in this class: 781
10-year publication summary
|
78
|
86
|
89
|
74
|
54
|
53
|
46
|
40
|
37
|
21
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Heavy Industries, Ltd. | 8846 |
51 |
| NOK Corporation | 2239 |
41 |
| Mitsubishi Power, Ltd. | 1805 |
37 |
| Mitsubishi Hitachi Power Systems, Ltd. | 992 |
36 |
| NTN Corporation | 4973 |
34 |
| Rtx Corporation | 9519 |
29 |
| Safran Aircraft Engines | 6344 |
21 |
| Inpro/Seal LLC | 86 |
20 |
| General Electric Company | 13862 |
19 |
| Aktiebolaget SKF | 2999 |
15 |
| Mitsubishi Heavy Industries Compressor Corporation | 633 |
15 |
| Schaeffler Technologies AG & Co. KG | 10094 |
14 |
| Siemens AG | 24366 |
13 |
| NSK Ltd. | 2807 |
12 |
| Stein Seal Company | 66 |
12 |
| Uchiyama Manufacturing Corp. | 128 |
12 |
| Pratt & Whitney Canada Corp. | 4858 |
10 |
| AES Engineering Ltd. | 85 |
9 |
| Rolls-Royce Corporation | 1759 |
9 |
| SEW-EURODRIVE GmbH & Co. KG | 1969 |
9 |
| Other owners | 363 |