- All sections
- B - Performing operationstransporting
- B63B - Ships or other waterborne vesselsequipment for shipping
- B63B 22/20 - Ballast means
Patent holdings for IPC class B63B 22/20
Total number of patents in this class: 105
10-year publication summary
|
20
|
12
|
4
|
5
|
3
|
12
|
11
|
15
|
6
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Raytheon Company | 8388 |
5 |
| University of Maine System Board of Trustees | 281 |
5 |
| Boston Engineering Corporation | 19 |
3 |
| ECA Robotics | 20 |
3 |
| ExxonMobil Upstream Research Company | 2411 |
3 |
| Principle Power, Inc. | 36 |
3 |
| TOA Corporation | 126 |
3 |
| The United States of America as represented by the Secretary of the Navy | 2735 |
2 |
| California Institute of Technology | 3967 |
2 |
| Babcock Integrated Technology Limited | 15 |
2 |
| Hydro LEDUC | 10 |
2 |
| Korea Institute of Geoscience and Mineral Resources | 238 |
2 |
| Libervit | 13 |
2 |
| PGS Geophysical AS | 537 |
2 |
| The Thin Red Line Aerospace Ltd. | 6 |
2 |
| Jurong Shipyard Pte. Ltd. | 30 |
2 |
| Nippon Hume Corporation | 9 |
2 |
| Marine Depth Control Engineering LLC | 6 |
2 |
| Impossible Mining Inc. | 5 |
2 |
| Displacement Dynamics, LLC | 2 |
2 |
| Other owners | 54 |