F04C 2210/221
Air
F04C2210/221 (Air) appears on 37 US grants and 47 published applications in this corpus.
Search patents in F04C- Granted patents
- 37
- Published applications
- 47
- Assignees
- 27
- Inventors
- 92
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 4 |
| 2020 | 4 | 7 |
| 2021 | 7 | 8 |
| 2022 | 7 | 5 |
| 2023 | 7 | 5 |
| 2024 | 5 | 5 |
| 2025 | 4 | 4 |
| 2026 | 1 | 2 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Compressed air station31 Mar 2026US 12,589,352 B2Kaeser Kompressoren SE
- Secondary airflow paths for air compressors9 Sep 2025US 12,410,799 B2Doosan Bobcat North America, Inc.
- Methods and systems for air compressor and engine driven control17 Jun 2025US 12,331,746 B2Illinois Tool Works Inc.
- Scroll compressor for generating oil-free compressed air4 Feb 2025US 12,215,690 B2OET GmbH
- Compressed air driven inverter generator28 Jan 2025US 12,209,499 B2
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Air Compressor30 Jul 2026US 2026/0218705 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Compressed air station29 May 2025US 2025/0170523 A9Kaeser Kompressoren SE
- Cooling arrangement and method for cooling an at least two-stage compressed air generator27 Mar 2025US 2025/0101971 A1
- Oil-Free Air Compressor27 Mar 2025US 2025/0101984 A1Hitachi Industrial Equipment Systems Co., Ltd.
Most cited
By later US patents
- High efficiency air delivery system and method17US 9,897,336 B22018
- Compressor with a closed loop water cooling system7US 10,746,177 B2Ingersoll-Rand Industrial U.S., Inc. · 2020
- Oil feed type air compressor3US 11,047,390 B2Hitachi, Ltd. · 2021
- Screw compressor with oil injection at multiple volume ratios3US 11,118,585 B2Ingersoll-Rand Industrial U.S., Inc. · 2021
- Slide valve, slide valve adjustment mechanism and screw compressor3US 11,365,736 B2Gree Electric Appliances, Inc. of Zhuhai · 2022