F41A 21/12
Cartridge chambers
Official title: Cartridge chambers; Chamber liners (F41A3/74, F41A9/46, F41A21/04 take precedence)
F41A21/12 (Cartridge chambers) appears on 142 US grants and 138 published applications in this corpus.
Search patents in F41A- Granted patents
- 142
- Published applications
- 138
- Assignees
- 77
- Inventors
- 211
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 3 |
| 2003 | 3 | 3 |
| 2004 | 5 | 6 |
| 2005 | 0 | 5 |
| 2006 | 3 | 4 |
| 2007 | 3 | 1 |
| 2008 | 2 | 4 |
| 2009 | 1 | 0 |
| 2010 | 1 | 7 |
| 2011 | 5 | 8 |
| 2012 | 3 | 5 |
| 2013 | 6 | 4 |
| 2014 | 7 | 4 |
| 2015 | 5 | 8 |
| 2016 | 6 | 6 |
| 2017 | 7 | 3 |
| 2018 | 1 | 4 |
| 2019 | 8 | 9 |
| 2020 | 8 | 10 |
| 2021 | 8 | 11 |
| 2022 | 8 | 12 |
| 2023 | 6 | 7 |
| 2024 | 6 | 7 |
| 2025 | 6 | 4 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cartridge of a firearm, cartridge chamber, combination consisting of a lock and cartridge chamber of such a cartridge, and firearm14 Jul 2026US 12,680,795 B2ATC Performance GmbH
- Adjusting device of toy gun17 Mar 2026US 12,578,162 B2Guay Guay Trading Co., Ltd.
- Reverse-saboted sidearm systems, and related sidearms, ammunition, and methods3 Feb 2026US 12,540,805 B2
- Small firearms and method of operating small firearms27 Jan 2026US 12,535,280 B2Schmeisser GmbH
- Load balanced firearm barrel extension6 Jan 2026US 12,516,902 B1Knight's Armament Company
- Single use firearm25 Jun 2026US 2026/0177339 A1P2K Technologies LLC
- System for a multi-caliber self-loading action assembly30 Apr 2026US 2026/0118075 A1
- Extended life composite matrix-wrapped lightweight firearm barrel17 Jul 2025US 2025/0230998 A1Brown Dog Intellectual Properties
- Multiple-barrel firearm and method of use26 Jun 2025US 2025/0207882 A1TMP Weapons, LLC
- Reverse-saboted sidearm systems, and related sidearms, ammunition, and methods20 Mar 2025US 2025/0093138 A1
Most cited
By later US patents
- Gun for firing a variety of projectiles78US 4,644,930 A1987
- Machine gun62US 4,066,000 ABrunswick Corporation · 1978
- Combination breech-loading to muzzle-loading firearm converting device and projectile casing53US 4,232,468 A1980
- Automatic or semi-automatic firearm42US 4,019,423 A1977
- Firearm cartridge and case-less chamber41US 7,086,336 B2Superior Ballistics, Inc. · 2006