- All sections
- F - Mechanical engineering; lighting; heating; weapons; blasting
- F16J - Pistons; cylinders; pressure vessels in general; sealings
- F16J 15/447 - Labyrinth packings
Patent holdings for IPC class F16J 15/447
Total number of patents in this class: 752
10-year publication summary
59
|
87
|
90
|
89
|
78
|
56
|
55
|
45
|
41
|
12
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Mitsubishi Heavy Industries, Ltd. | 8217 |
45 |
NOK Corporation | 2108 |
42 |
Mitsubishi Hitachi Power Systems, Ltd. | 999 |
36 |
NTN Corporation | 5008 |
34 |
Mitsubishi Power, Ltd. | 1680 |
31 |
Rtx Corporation | 8674 |
28 |
General Electric Company | 18133 |
21 |
Safran Aircraft Engines | 5739 |
20 |
Inpro/Seal LLC | 69 |
18 |
Aktiebolaget SKF | 2700 |
14 |
Mitsubishi Heavy Industries Compressor Corporation | 613 |
14 |
Stein Seal Company | 69 |
14 |
Siemens AG | 24990 |
13 |
Schaeffler Technologies AG & Co. KG | 8880 |
12 |
NSK Ltd. | 2719 |
11 |
AES Engineering Ltd. | 95 |
11 |
Pratt & Whitney Canada Corp. | 4215 |
10 |
Rolls-Royce Corporation | 1686 |
9 |
SEW-EURODRIVE GmbH & Co. KG | 1816 |
9 |
Ebara Corporation | 1951 |
8 |
Other owners | 352 |