F01N 2450/06
Inserting sound absorbing material into a chamber
F01N2450/06 (Inserting sound absorbing material into a chamber) appears on 45 US grants and 33 published applications in this corpus.
Search patents in F01N- Granted patents
- 45
- Published applications
- 33
- Assignees
- 35
- Inventors
- 97
- Latest grant
- 20 May 2025
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 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 0 | 1 |
| 2002 | 3 | 5 |
| 2003 | 5 | 2 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 2 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 0 | 2 |
| 2020 | 1 | 1 |
| 2021 | 3 | 2 |
| 2022 | 2 | 3 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Sound attenuator as well as elements and a method of production thereof20 May 2025US 12,305,547 B2Teknologian tutkimuskeskus VTT Oy
- Method for filling silencer with sound absorbing material7 Jan 2025US 12,188,389 B2Yutaka Glken Co., Ltd.
- Silencing apparatus and method for manufacturing silencing apparatus26 Dec 2023US 11,852,058 B2Sankei Giken Kogyo Co., Ltd.
- Method for manufacturing a vehicle muffler5 Sep 2023US 11,746,682 B2Nakagawa Sangyo Co., Ltd.
- Method and apparatus for filling silencer with glass fiber29 Mar 2022US 11,286,820 B2Crefact Co., Ltd.
- Method for filling silencer with sound absorbing material14 Sep 2023US 2023/0287815 A1Yutaka Giken Co., Ltd.
- Method for manufacturing a vehicle muffler8 Sep 2022US 2022/0282649 A1Nakagawa Sangyo Co., Ltd.
- A sound attenuator as well as elements and a method of production thereof31 Mar 2022US 2022/0099006 A1Teknologian tutkimuskeskus VTT Oy
- Silencing apparatus and method for manufacturing silencing apparatus3 Mar 2022US 2022/0065144 A1Sankei Giken Kogyo Co., Ltd.
- Method and apparatus for filling silencer with glass fiber25 Nov 2021US 2021/0363903 A1Crefact Co., Ltd.
Most cited
By later US patents
- Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same54US 4,569,471 AAB Volvo · 1986
- Free flow sound attenuating device and method of making40US 3,955,643 ABrunswick Corporation · 1976
- Multi-chamber muffler with selective sound absorbent material placement37US 5,783,782 ATenneco Automotive Inc. · 1998
- Method and apparatus for making preforms from glass fiber strand material36US 5,766,541 AO-C Fiberglas Sweden AB · 1998
- Apparatus for filling automotive muffler with glass fibers30US 4,774,985 ATBA Industrial Products Limited · 1988