- All sections
- B - Performing operations; transporting
- B63H - Marine propulsion or steering
- B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
Patent holdings for IPC class B63H 21/38
Total number of patents in this class: 537
10-year publication summary
|
61
|
57
|
59
|
67
|
50
|
37
|
26
|
52
|
58
|
25
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daewoo Shipbuilding & Marine Engineering Co., Ltd. | 236 |
63 |
| Hanwha Ocean Co., Ltd. | 81 |
38 |
| Mitsubishi Shipbuilding Co., Ltd. | 136 |
28 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 2856 |
25 |
| Hyundai Heavy Industries Co., Ltd. | 281 |
22 |
| Brunswick Corporation | 1271 |
21 |
| Mitsubishi Heavy Industries, Ltd. | 8217 |
15 |
| Yamaha Motor Co., Ltd. | 2740 |
11 |
| Wartsila Finland Oy | 740 |
11 |
| Samsung Heavy Ind. Co., Ltd. | 240 |
9 |
| Volvo Penta Corporation | 91 |
7 |
| AB Volvo Penta | 95 |
6 |
| Alfa Laval Corporate AB | 1265 |
6 |
| Mitsui E&S Shipbuilding Co., Ltd. | 45 |
6 |
| Korea Shipbuilding & Offshore Engineering Co.,Ltd. | 28 |
6 |
| Honda Motor Co., Ltd. | 24537 |
5 |
| ZF Friedrichshafen AG | 6820 |
5 |
| Infineum International Limited | 340 |
5 |
| Mitsui Engineering & Shipbuilding Co., Ltd. | 331 |
5 |
| Nippon Yusen Kabushiki Kaisha | 150 |
5 |
| Other owners | 238 |