F04C 23/003
Having complementary function
Official title: {having complementary function}
F04C23/003 (Having complementary function) appears on 92 US grants and 89 published applications in this corpus.
Search patents in F04C- Granted patents
- 92
- Published applications
- 89
- Assignees
- 63
- Inventors
- 212
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 3 | 1 |
| 2003 | 5 | 1 |
| 2004 | 2 | 4 |
| 2005 | 3 | 6 |
| 2006 | 3 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 1 |
| 2012 | 3 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 5 |
| 2015 | 1 | 5 |
| 2016 | 3 | 6 |
| 2017 | 3 | 11 |
| 2018 | 3 | 8 |
| 2019 | 9 | 4 |
| 2020 | 3 | 3 |
| 2021 | 4 | 4 |
| 2022 | 2 | 4 |
| 2023 | 7 | 3 |
| 2024 | 4 | 3 |
| 2025 | 3 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling a rotary screw compressor17 Feb 2026US 12,553,436 B2Gardner Denver Deutschland GmbH
- Floating-type oil-free vacuum scroll compressor23 Dec 2025US 12,504,013 B2Shenyang Canta Medical Tech. Co., Ltd.
- Parallel connected multiple shaft roots vacuum pump13 May 2025US 12,297,831 B1China Link Consultant Company, Ltd.
- System for heating and/or cooling an interior environment21 Jan 2025US 12,202,315 B2
- Multi-stage compressor having interstage lubricant injection via an injection rod19 Nov 2024US 12,146,494 B2Ingersoll-Rand Industrial U.S., Inc.
- Scroll compressor1 Oct 2026US 2026/0298234 A1Ishikawa Energy Research Co., Ltd.
- Rotor-stator assembly for a rotary engine, compressor or pump, a rotary engine and a lifting unit and device25 Jun 2026US 2026/0176971 A1
- Floating-type oil-free vacuum scroll compressor8 May 2025US 2025/0146487 A1Shenyang Canta Medical Tech. Co., Ltd.
- Parallel connected multiple shaft roots vacuum pump8 May 2025US 2025/0146490 A1China Link Consultant Company, Ltd.
- Multi-stage compressor having interstage lubricant injection via an injection rod24 Apr 2025US 2025/0129784 A1
Most cited
By later US patents
- Air conditioning system having super-saturation for reduced driving requirement40US 3,967,466 AThe Rovac Corporation · 1976
- Unitary sliding vane compressor-expander and electrical generation system38US 6,589,033 B1Phoenix Analysis and Design Technologies, Inc. · 2003
- Fuel cell system having scroll type compressor and regenerator34US 6,361,890 B1Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · 2002
- Rotary heat driven compressor33US 5,336,059 AE A Squared, Inc. · 1994
- Sliding-blade vapor engine with vortex boiler33US 5,758,501 A1998