F04C 2270/56
Number of pump/machine units in operation
F04C2270/56 (Number of pump/machine units in operation) appears on 46 US grants and 39 published applications in this corpus.
Search patents in F04C- Granted patents
- 46
- Published applications
- 39
- Assignees
- 33
- Inventors
- 108
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 4 |
| 2006 | 2 | 6 |
| 2007 | 1 | 1 |
| 2008 | 2 | 3 |
| 2009 | 3 | 2 |
| 2010 | 1 | 7 |
| 2011 | 1 | 6 |
| 2012 | 5 | 1 |
| 2013 | 3 | 1 |
| 2014 | 4 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 3 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 2 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling a compressor installation4 Aug 2026US 12,698,766 B2Kaeser Kompressoren SE
- Compressor7 Apr 2026US 12,595,793 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Compressor, air conditioner and method for assembling compressor10 Dec 2024US 12,163,521 B2Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Method for controlling a compressor installation2 Nov 2021US 11,162,492 B2Kaeser Kompressoren SE
- Transfer device5 May 2020US 10,641,266 B2Aisin Aw Co., Ltd.
- Compressor12 Sep 2024US 2024/0301882 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Method for Controlling a Compressor Installation17 Feb 2022US 2022/0049693 A1Kaeser Kompressoren SE
- Compressor, air conditioner and method for assembling compressor9 Jul 2020US 2020/0217317 A1Green Refrigeration Equipment Engineering Research Center of Zhuhai Gree Co., Ltd.
- Transfer device14 Dec 2017US 2017/0356444 A1Aisin Aw Co., Ltd.
- Compressed air system and method of operating same12 Oct 2017US 2017/0292522 A1Toyota Motor Engineering & Manufacturing North America, Inc.
Most cited
By later US patents
- System and method for controlling rotary screw compressors125US 6,450,771 B1Coltec Industries Inc. · 2002
- System and methods for controlling rotary screw compressors122US 5,713,724 AColtec Industries Inc. · 1998
- Method of controlling operation of a plurality of compressors102US 4,580,947 AHitachi, Ltd. · 1986
- Systems and methods for remotely controlling a machine82US 6,529,590 B1Coltec Industries Inc. · 2003
- System and methods for controlling rotary screw compressors70US 6,533,552 B2Coltec Industries Inc. · 2003