- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F02B - Internal-combustion piston enginescombustion engines in general
- F02B 71/00 - Free-piston enginesEngines without rotary main shaft
Patent holdings for IPC class F02B 71/00
Total number of patents in this class: 137
10-year publication summary
|
7
|
22
|
6
|
15
|
13
|
7
|
8
|
6
|
5
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mainspring Energy, Inc. | 111 |
36 |
| Aquarius Engines (A.M.) Ltd. | 37 |
22 |
| Illinois Tool Works Inc. | 11450 |
14 |
| Deutsches Zentrum für Luft- und Raumfahrt e.V. | 789 |
8 |
| Sturman Digital Systems, LLC | 41 |
4 |
| Achates Power, Inc. | 205 |
3 |
| Libertine FPE Ltd. | 30 |
3 |
| Regents of the University of Minnesota | 2688 |
3 |
| Robert Bosch GmbH | 42614 |
2 |
| EtaGen, Inc. | 27 |
2 |
| Power Tech Staple and Nail, Inc. | 12 |
2 |
| University of Durham | 121 |
2 |
| University of Newcastle upon Tyne | 245 |
2 |
| Waseda University | 450 |
2 |
| ClearFlame Engines, Inc. | 44 |
2 |
| Enterprise Science Fund, LLC | 136 |
2 |
| Siemens AG | 24525 |
1 |
| GM Global Technology Operations LLC | 14937 |
1 |
| Industrial Technology Research Institute | 5086 |
1 |
| Caterpillar Inc. | 9527 |
1 |
| Other owners | 24 |