E05B 37/20
Puzzle locks
Official title: Puzzle locks {, e.g. of labyrinth type; Fasteners with hidden or secret actuating mechanisms}
E05B37/20 (Puzzle locks) appears on 34 US grants and 16 published applications in this corpus.
Search patents in E05B- Granted patents
- 34
- Published applications
- 16
- Assignees
- 10
- Inventors
- 51
- Latest grant
- 7 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 3 |
| 2017 | 2 | 2 |
| 2018 | 1 | 1 |
| 2019 | 4 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Combination switch and sliding bolt lock wall safe imitating a circuit breaker panel7 Nov 2023US 11,808,075 B2
- 3D printed maze lock system26 Apr 2022US 11,311,793 B1King Abdulaziz University
- Access-control fixture lock30 Jul 2019US 10,364,595 B2Dorel Juvenile Group, Inc.
- Hidden-lock door panel and containing device having the same2 Jul 2019US 10,337,206 B2Delta Electronics, Inc.
- Access-control system for door lock21 May 2019US 10,294,697 B2Dorel Juvenile Group, Inc.
- Combination switch and sliding bolt lock3 Feb 2022US 2022/0034147 A1
- Hidden-lock door panel and containing device having the same23 Aug 2018US 2018/0238078 A1Delta Electronics, Inc.
- Hidden-lock door panel and containing device having the same13 Apr 2017US 2017/0101807 A1Delta Electronics, Inc.
- Methods and systems of electronic and mechanical dual combination locks23 Feb 2017US 2017/0051531 A1Nanjing Easthouse Electrical Co., Ltd.
- A code combination lock6 Oct 2016US 2016/0290008 A1Yifeng Manufacturing Co., Ltd.
Most cited
By later US patents
- Gun box latching mechanism67US 5,172,575 A1992
- Hidden, releasable latch for a molded plastic enclosure62US 5,348,356 AApple Computer, Inc. · 1994
- Personal carrier case40US 5,950,816 A1999
- Latch assembly and concealed opening32US 4,993,762 ARAM Enterprises, Inc. · 1991
- Door lock with locking pin28US 4,844,519 A1989