F41A 5/22
Having two or more gas pistons
Official title: having two or more gas pistons
F41A5/22 (Having two or more gas pistons) appears on 24 US grants and 9 published applications in this corpus.
Search patents in F41A- Granted patents
- 24
- Published applications
- 9
- Assignees
- 10
- Inventors
- 26
- Latest grant
- 6 Dec 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- System for a delayed-opposed-piston gas action assembly6 Dec 2022US 11,519,681 B2
- Gas piston and weapon25 Oct 2022US 11,480,400 B2Rheinmetall Waffe Munition GmbH
- Bolt carrier group for direct gas impingement system24 Sep 2019US 10,422,596 B2Kramer Cartridge & Carbine LLC
- Gas-operated firearm with pressure compensating gas piston14 Nov 2017US 9,816,768 B2RA Brands, L.L.C.
- Gas-operated firearm with pressure compensating gas piston5 Jul 2016US 9,383,149 B2RA Brands, L.L.C.
- System for a delayed-opposed-piston gas action assembly20 Oct 2022US 2022/0333884 A1
- Gas piston and weapon16 Jun 2022US 2022/0187037 A1Rheinmetall Waffe Munition GmbH
- Bolt carrier group for direct gas impingement system7 Mar 2019US 2019/0072345 A1Kramer Cartridge & Carbine LLC, dba Kramer Defense
- Gas-operated firearm with pressure compensating gas piston30 Mar 2017US 2017/0089652 A1RA Brands, L.L.C.
- Gas-operated firearm with pressure compensating gas piston24 Mar 2016US 2016/0084597 A1RA Brands, L.L.C.
Most cited
By later US patents
- Modular lightweight squad automatic weapon system108US 3,999,461 AThe United States of America as represented by the Secretary of the Army · 1976
- Gas-operated automatic firearm, particularly a shotgun38US 5,959,234 ABenelli Armi S.P. A. · 1999
- Autoloading gas-operated firearm33US 4,102,242 AO. F. Mossberg & Sons, Inc. · 1978
- Anti-bounce apparatus for reciprocating bolt assemblies of automatic cannon26US 4,227,439 AARES, Inc. · 1980
- Automatic weapon firing mechanism25US 4,022,105 AThe United States of America as represented by the Secretary of the Army · 1977