F41H 5/22
Manhole covers
Official title: Manhole covers, e.g. on tanks; {Doors on armoured vehicles or structures}
F41H5/22 (Manhole covers) appears on 116 US grants and 96 published applications in this corpus.
Search patents in F41H- Granted patents
- 116
- Published applications
- 96
- Assignees
- 70
- Inventors
- 251
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 0 | 3 |
| 2011 | 2 | 8 |
| 2012 | 4 | 17 |
| 2013 | 14 | 4 |
| 2014 | 10 | 8 |
| 2015 | 6 | 6 |
| 2016 | 5 | 5 |
| 2017 | 4 | 3 |
| 2018 | 3 | 2 |
| 2019 | 1 | 2 |
| 2020 | 4 | 10 |
| 2021 | 0 | 6 |
| 2022 | 6 | 2 |
| 2023 | 7 | 5 |
| 2024 | 2 | 2 |
| 2025 | 4 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Impact resistant garage door4 Aug 2026US 12,698,953 B2
- Manufacturing method of an intelligent anti-terrorism protective door7 Apr 2026US 12,595,701 B2
- Protective apparatus and aerial work device16 Dec 2025US 12,497,813 B2Hunan Sinoboom Intelligent Equipment Co., Ltd.
- Layer composite door systems8 Jul 2025US 12,352,541 B2Aadg, Inc.
- Frustum embedded fabricated composite protective structure6 May 2025US 12,292,264 B2Qingdao University of Technology
- Ballistic Shield For Body-Carrying or For Vehicle Mounting20 Aug 2026US 2026/0243547 A1
- Layer composite door systems25 Sep 2025US 2025/0297835 A1Aadg, Inc.
- A manufacturing method of an intelligent anti-terrorism protective door3 Jul 2025US 2025/0215742 A1
- Emergency opening device for a closure20 Mar 2025US 2025/0092733 A1Nowak Innovations SpóLka Z Ograniczona Odpowiedzialnoscia
- Bullet Resistant Garage Door Assembly with a Shell Formed From Coil Stock6 Feb 2025US 2025/0044063 A1
Most cited
By later US patents
- Vehicle mine protection structure156US 5,663,520 AO'Gara-Hess & Eisenhardt Armoring Co. · 1997
- Removable bulletproof apparatus for vehicles73US 5,438,908 A1995
- Interior armor for passenger vehicles71US 5,679,918 AThe United States of America as represented by the Secretary of the Army · 1997
- Manhole cover hinge assembly69US 8,206,058 B2East Jordan Iron Works, Inc. · 2012
- Lightweight armored vehicle and method of making same68US 6,327,954 B12001