E05B 35/12
Requiring the use of two keys
Official title: requiring the use of two keys, e.g. safe-deposit locks (locks with key-operated keyhole cover E05B17/142)
E05B35/12 (Requiring the use of two keys) appears on 55 US grants and 31 published applications in this corpus.
Search patents in E05B- Granted patents
- 55
- Published applications
- 31
- Assignees
- 26
- Inventors
- 67
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 3 |
| 2003 | 4 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 2 |
| 2008 | 2 | 3 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 7 |
| 2013 | 1 | 0 |
| 2014 | 1 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 4 |
| 2023 | 3 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular locking apparatus with an actuator operating multiple latches15 Sep 2026US 12,735,916 B2Aristocrat Technologies, Inc.
- Key capture lock15 Jul 2025US 12,359,461 B2United States Postal Service
- Passive electronic locks and methods of using the same31 Oct 2023US 11,804,083 B2Nanjing Easthouse Electrical Co., Ltd.
- Dust-proof and anti-theft tubular lock assembly10 Oct 2023US 11,781,343 B2Aba Locks International Co., Ltd.
- Mechanical object tracking system8 Aug 2023US 11,719,027 B2
- Key capture lock6 Nov 2025US 2025/0341114 A1United States Postal Service
- Modular locking apparatus with an actuator operating multiple latches24 Jul 2025US 2025/0237096 A1Aristocrat Technologies, Inc.
- Passive electronic locks and methods of using the same1 Jun 2023US 2023/0169806 A1Nanjing Easthouse Electrical Co., Ltd.
- Dust-proof and anti-theft tubular lock assembly3 Nov 2022US 2022/0349211 A1Aba Locks International Co., Ltd.
- Mechanical object tracking system20 Oct 2022US 2022/0333415 A1
Most cited
By later US patents
- Latch assembly70US 6,068,308 AAustin Hardware, Inc. · 2000
- Safety lock49US 5,020,342 A529900 Ontario Ltd. · 1991
- Double lock T-handle assembly45US 6,532,778 B2Allegis Corporation · 2003
- Latch assembly41US 6,318,770 B1Austin Hardware, Inc. · 2001
- Double lock T-handle assembly39US 6,952,940 B2Allegis Corporation · 2005