F16L 9/21
Made of sound-absorbing materials or with sound-absorbing structure
Official title: made of sound-absorbing materials or with sound-absorbing structure
F16L9/21 (Made of sound-absorbing materials or with sound-absorbing structure) appears on 78 US grants and 46 published applications in this corpus.
Search patents in F16L- Granted patents
- 78
- Published applications
- 46
- Assignees
- 58
- Inventors
- 148
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 12 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 2 |
| 2006 | 4 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 3 | 1 |
| 2012 | 2 | 3 |
| 2013 | 2 | 3 |
| 2014 | 1 | 0 |
| 2015 | 1 | 7 |
| 2016 | 4 | 5 |
| 2017 | 3 | 2 |
| 2018 | 2 | 2 |
| 2019 | 6 | 2 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 1 |
| 2023 | 3 | 3 |
| 2024 | 3 | 4 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ventilation device for a ventilation, heating and/or air conditioning system of a motor vehicle24 Mar 2026US 12,583,284 B2Valeo Systemes Thermiques
- Muffler with metallic meshed rings30 Jul 2024US 12,050,032 B2Carrier Corporation
- Ducts comprising exoskeleton and sound-absorbing structures and vehicles using such ducts18 Jun 2024US 12,013,071 B2The Boeing Company
- Pre-fabricated grease duct system30 Jan 2024US 11,885,503 B2Van-Packer Company
- Muffler with metallic meshed rings7 Nov 2023US 11,808,490 B2Carrier Corporation
- Duct structure11 Jul 2024US 2024/0229978 A1Honda Motor Co., Ltd.
- Duct structure11 Jul 2024US 2024/0234865 A1Honda Motor Co., Ltd.
- Ventilation device for a ventilation, heating and/or air conditioning system of a motor vehicle13 Jun 2024US 2024/0190205 A1Valeo Systemes Thermiques
- Pipeline provided with silencing structure29 Feb 2024US 2024/0068601 A1
- Muffler with metallic meshed rings7 Dec 2023US 2023/0392827 A1Carrier Corporation
Most cited
By later US patents
- Sound-insulated flow duct and process for the manufacture thereof70US 4,615,411 ADynamit Nobel Aktiengesellschaft · 1986
- Vibration damping heat shrinkable tubing69US 5,048,572 AEssex Group, Inc. · 1991
- Oriented polymeric products67US 6,053,214 AUponor N.V. · 2000
- Packless silencer55US 4,287,962 AIndustrial Acoustics Company, Inc. · 1981
- Flexible conduit45US 3,974,862 AKabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft · 1976