- All sections
- B - Performing operationstransporting
- 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: 743
10-year publication summary
|
59
|
67
|
50
|
38
|
26
|
52
|
59
|
76
|
74
|
66
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daewoo Shipbuilding & Marine Engineering Co., Ltd. | 231 |
63 |
| Hanwha Ocean Co., Ltd. | 152 |
54 |
| Mitsubishi Shipbuilding Co., Ltd. | 186 |
45 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 3245 |
35 |
| HD Hyundai Heavy Industries Co., Ltd. | 94 |
27 |
| Brunswick Corporation | 1479 |
25 |
| HD Korea Shipbuilding ＆ Offshore Engineering Co., Ltd. | 114 |
25 |
| Hyundai Heavy Industries Co., Ltd. | 270 |
22 |
| Mitsubishi Heavy Industries, Ltd. | 9115 |
16 |
| Yamaha Motor Co., Ltd. | 2837 |
13 |
| Alfa Laval Corporate AB | 1335 |
11 |
| Volvo Penta Corporation | 192 |
11 |
| Wartsila Finland Oy | 754 |
10 |
| Nippon Yusen Kabushiki Kaisha | 170 |
9 |
| Samsung Heavy Ind. Co., Ltd. | 249 |
9 |
| Guangdong ePropulsion Technology Limited | 125 |
9 |
| HD Hyundai Samho Co., Ltd. | 40 |
9 |
| Honda Motor Co., Ltd. | 26008 |
8 |
| Korea Shipbuilding & Offshore Engineering Co.,Ltd. | 30 |
8 |
| Yanmar Holdings Co., Ltd. | 610 |
8 |
| Other owners | 326 |