- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquidsrotary-piston, or oscillating-piston, positive-displacement pumps
- F04C 18/22 - Rotary-piston pumps specially adapted for elastic fluids of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member
Patent holdings for IPC class F04C 18/22
Total number of patents in this class: 43
10-year publication summary
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3
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4
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3
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4
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7
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7
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5
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6
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6
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2
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| GREE Electric Appliances, Inc. of Zhuhai | 3257 |
6 |
| Korea Atomic Energy Research Institute | 445 |
5 |
| Maruko Keihoki Co., Ltd. | 7 |
4 |
| Illinois Tool Works Inc. | 11522 |
3 |
| RPC Engineering Limited Liability Company | 5 |
3 |
| Daikin Industries, Ltd. | 10142 |
2 |
| ACIST Medical Systems, Inc. | 304 |
2 |
| Edwards Limited | 786 |
2 |
| LG Electronics Inc. | 73619 |
1 |
| International Business Machines Corporation | 61694 |
1 |
| Pratt & Whitney Canada Corp. | 4876 |
1 |
| Hyundai Motor Company | 22664 |
1 |
| Kia Motors Corporation | 7743 |
1 |
| Atlas Copco Airpower, naamloze vennootschap | 1036 |
1 |
| Fujitsu General Limited | 626 |
1 |
| Genesis Advanced Technology Inc. | 52 |
1 |
| KT Projektentwicklungs-GmbH | 32 |
1 |
| Rini Technologies, Inc. | 2 |
1 |
| Stackpole International Engineered Products, Ltd. | 28 |
1 |
| Toshiba Carrier Corporation | 492 |
1 |
| Other owners | 4 |