F04C 29/06
Silencing
Official title: Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N)
F04C29/06 (Silencing) appears on 503 US grants and 505 published applications in this corpus.
Search patents in F04C- Granted patents
- 503
- Published applications
- 505
- Assignees
- 213
- Inventors
- 1,199
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 16 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 14 | 1 |
| 2002 | 11 | 8 |
| 2003 | 3 | 7 |
| 2004 | 7 | 10 |
| 2005 | 8 | 14 |
| 2006 | 5 | 22 |
| 2007 | 6 | 10 |
| 2008 | 7 | 18 |
| 2009 | 11 | 15 |
| 2010 | 10 | 15 |
| 2011 | 10 | 12 |
| 2012 | 10 | 26 |
| 2013 | 16 | 16 |
| 2014 | 11 | 13 |
| 2015 | 21 | 24 |
| 2016 | 12 | 24 |
| 2017 | 26 | 18 |
| 2018 | 21 | 39 |
| 2019 | 17 | 28 |
| 2020 | 19 | 36 |
| 2021 | 31 | 30 |
| 2022 | 39 | 27 |
| 2023 | 36 | 28 |
| 2024 | 29 | 22 |
| 2025 | 24 | 19 |
| 2026 | 9 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inlet silencer for a volumetric compressor and volumetric compressor equipped with it8 Sep 2026US 12,729,672 B2Atlas Copco Airpower, Naamloze Vennootschap
- Compressor8 Sep 2026US 12,729,689 B2Hitachi-Johnson Controls Air Conditioning, Inc.
- Electrohydraulic drive system19 May 2026US 12,631,174 B2Hydac Drive Center GmbH
- Positive displacement roots blower noise suppression12 May 2026US 12,624,693 B2Ingersoll-Rand Industrial U.S., Inc.
- Co-rotating scroll compressor21 Apr 2026US 12,607,186 B2Kabushiki Kaisha Toyota Jidoshokki
- Screw compressor, refrigeration system17 Sep 2026US 2026/0275988 A1Carrier Corporation
- Roots-type compressor system27 Aug 2026US 2026/0251145 A1
- Vibration-isolation and sound-isolation apparatus, bracket with vibration-isolation and sound-isolation function, and fixing structure for vehicle electric auxiliary machine20 Aug 2026US 2026/0241876 A1Sumitomo Riko Company Limited
- Packaged gas compressor13 Aug 2026US 2026/0235128 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Compressor-adapted enclosure and compressor unit6 Aug 2026US 2026/0226899 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Portable ventilator system278US 7,188,621 B2Pulmonetic Systems, Inc. · 2007
- Mounting body127US 6,216,691 B1ResMed Limited · 2001
- Air compressor apparatus including noise-reducing means82US 4,264,282 AK. C. Mosier Company · 1981
- Refrigeration compressor muffler81US 5,705,777 ACarrier Corporation · 1998
- Multi-stage low pressure drop muffler78US 8,016,071 B1Trane International Inc. · 2011