- All sections
- B - Performing operationstransporting
- B63H - Marine propulsion or steering
- B63H 1/28 - Other means for improving propeller efficiency
Patent holdings for IPC class B63H 1/28
Total number of patents in this class: 130
10-year publication summary
|
17
|
13
|
14
|
12
|
9
|
6
|
9
|
11
|
8
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| becker marine systems GmbH & Co. KG | 47 |
13 |
| General Electric Company | 13829 |
5 |
| Korea Institute of Ocean Science & Technology | 415 |
5 |
| Samsung Heavy Ind. Co., Ltd. | 239 |
4 |
| Wartsila Finland Oy | 742 |
4 |
| BiomeRenewables Inc. | 25 |
4 |
| Mitsubishi Heavy Industries, Ltd. | 8647 |
3 |
| ABB Schweiz AG | 6887 |
3 |
| Rolls-Royce Aktiebolag | 25 |
3 |
| Fieldge Co., Ltd. | 5 |
3 |
| Siemens AG | 24561 |
2 |
| Yamaha Motor Co., Ltd. | 2805 |
2 |
| BAE SYSTEMS plc | 2327 |
2 |
| Chugoku Marine Paints, Ltd. | 169 |
2 |
| Marine Dynamics, Inc. | 9 |
2 |
| Mitsui O.S.K. Lines, Ltd. | 47 |
2 |
| Rolls-Royce Marine AS | 69 |
2 |
| Sport Marine Technologies, Inc. | 17 |
2 |
| Veem Engineering Group Pty Ltd. | 3 |
2 |
| Wärtsilä Netherlands B.V. | 24 |
2 |
| Other owners | 63 |