- 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: 788
10-year publication summary
|
90
|
89
|
78
|
56
|
55
|
49
|
45
|
40
|
26
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Heavy Industries, Ltd. | 9115 |
51 |
| NOK Corporation | 2296 |
41 |
| Mitsubishi Power, Ltd. | 1832 |
38 |
| Mitsubishi Hitachi Power Systems, Ltd. | 991 |
36 |
| NTN Corporation | 4915 |
35 |
| Rtx Corporation | 10082 |
28 |
| Safran Aircraft Engines | 6671 |
22 |
| General Electric Company | 13888 |
19 |
| Inpro/Seal LLC | 103 |
19 |
| Aktiebolaget SKF | 3126 |
16 |
| Schaeffler Technologies AG & Co. KG | 10948 |
15 |
| Mitsubishi Heavy Industries Compressor Corporation | 640 |
15 |
| Pratt & Whitney Canada Corp. | 5472 |
14 |
| Siemens AG | 24033 |
13 |
| NSK Ltd. | 2831 |
12 |
| Uchiyama Manufacturing Corp. | 133 |
12 |
| Stein Seal Company | 66 |
11 |
| SEW-EURODRIVE GmbH & Co. KG | 2033 |
9 |
| Ebara Corporation | 2323 |
8 |
| Rolls-Royce Corporation | 1676 |
8 |
| Other owners | 366 |