E05B 19/22
Keys with devices for indicating whether the last operation was locking or
Official title: Keys with devices for indicating whether the last operation was locking or unlocking
E05B19/22 (Keys with devices for indicating whether the last operation was locking or) appears on 25 US grants and 19 published applications in this corpus.
Search patents in E05B- Granted patents
- 25
- Published applications
- 19
- Assignees
- 11
- Inventors
- 52
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 3 |
| 2005 | 3 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 0 | 0 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cylinder lock apparatus and parts thereof5 May 2026US 12,618,698 B2Avantis Hardware Limited
- System including audit enhancement assembly with enhanced sensing capability4 Jun 2024US 12,000,173 B1
- Method for detecting a change of a state of a lock and a system for detecting a change of a state of a lock18 Jan 2022US 11,225,811 B2Locky Sp. Z O.O.
- Key accessory14 Dec 2021US 11,199,024 B2OMRON Corporation
- Key with indication “locked—unlocked” of a cylinder lock29 Mar 2016US 9,297,184 B2
- Cylinder lock apparatus and parts thereof20 Jun 2024US 2024/0200992 A1Avantis Hardware Limited
- Key accessory27 Aug 2020US 2020/0270901 A1OMRON Corporation
- Method for detecting a change of a state of a lock and a system for detecting a change of a state of a lock26 Dec 2019US 2019/0390479 A1Locky Sp. Z O.O.
- Key with indication "locked - unlocked" of a cylinder lock22 Oct 2015US 2015/0300042 A1
- Low-cost door key with switch sensor indicator to detect dead bolt lock status13 Jun 2013US 2013/0145802 A1
Most cited
By later US patents
- Process and device for controlling the closure of locks32US 6,255,957 B1VOS Verkehrs-Optimierungs-Systeme GmbH & Co. KG · 2001
- Device for confirming whether a lock is locked or unlocked28US 4,936,896 A1990
- Locking key with memory24US 4,631,943 A1986
- Lock condition indicator device23US 5,595,080 A1997
- Locking key with memory22US 4,432,218 A1984