F41A 21/487
Using friction
Official title: {using friction, e.g. by clamping a barrel surface}
F41A21/487 (Using friction) appears on 57 US grants and 52 published applications in this corpus.
Search patents in F41A- Granted patents
- 57
- Published applications
- 52
- Assignees
- 33
- Inventors
- 62
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 3 | 2 |
| 2016 | 0 | 2 |
| 2017 | 5 | 4 |
| 2018 | 3 | 6 |
| 2019 | 6 | 2 |
| 2020 | 4 | 9 |
| 2021 | 5 | 4 |
| 2022 | 3 | 6 |
| 2023 | 5 | 4 |
| 2024 | 3 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rifle with straight pull bolt action2 Jun 2026US 12,644,660 B2Savage Arms, Inc.
- Assembly of a receiver with a barrel21 Oct 2025US 12,449,221 B2Ceska Zbrojovka A.S.
- Conversion kit for replacing a barrel on a service weapon with a training barrel to fire reduced energy training rounds29 Jul 2025US 12,372,321 B2General Dynamics Ordnance and Tactical Systems - Canada, Inc.
- Firearm receiver assembly15 Apr 2025US 12,276,470 B2LWRC International LLC
- Firearm with barrel clamp17 Sep 2024US 12,092,413 B2Glock Technology GmbH
- Rifle with straight pull bolt action26 Feb 2026US 2026/0055978 A1Savage Arms, Inc.
- Firearm receiver assembly1 Jan 2026US 2026/0002753 A1LWRC International LLC
- Assembly of a receiver with a barrel4 Sep 2025US 2025/0277644 A1Ceska Zbrojovka A.S.
- Tapered barrel interface3 Oct 2024US 2024/0328739 A1WHG Properties, LLC
- Conversion kit for replacing a barrel on a service weapon with a training barrel to fire reduced energy training rounds25 Jul 2024US 2024/0247903 A1General Dynamics Ordnance and Tactical Systems - Canada, Inc.
Most cited
By later US patents
- Firearm receiver assembly78US 9,140,506 B2LWRC International LLC · 2015
- Modular receiver system64US 7,313,883 B2Leitner-Wise Rifle Co., Inc. · 2008
- Gun with intermediate support for barrel thereof41US 4,120,276 ABangor Punta Operations, Inc. · 1978
- Forend structure for pistol conversion assembly35US 4,602,450 APachmayr Gun Works, Inc. · 1986
- Interchangeable barrel system for rifles34US 7,451,564 B2Full Nelson, LLC · 2008