G04C 21/18
By mechanically unlocking an electromechanical vibrator
Official title: by mechanically unlocking an electromechanical vibrator, e.g. actuated by the leakage flux of the electric driving means
G04C21/18 (By mechanically unlocking an electromechanical vibrator) appears on 10 US grants and 4 published applications in this corpus.
Search patents in G04C- Granted patents
- 10
- Published applications
- 4
- Assignees
- 7
- Inventors
- 28
- Latest grant
- 25 Jan 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Electronic device for providing time information and operation method of electronic device25 Jan 2022US 11,231,782 B2Samsung Electronics Co., Ltd.
- Remote controlled awakening device24 Jun 2008US 7,391,330 B1
- Tactile reminder device1 Aug 2006US 7,085,197 B1
- Arrangement for and method of waking a sleeper1 Sep 1992US 5,144,600 A
- Battery operated panic alarm wrist watch27 May 1986US 4,591,836 A
- Internal chime mechanism for an alarm clock28 Aug 2025US 2025/0271813 A1Nanu Design Inc.
- Electronic device for providing time information and operation method of electronic device3 Sep 2020US 2020/0278749 A1Samsung Electronics Co., Ltd.
- Vibrating alarm and method of waking25 Oct 2012US 2012/0269046 A1
- System and method of silent alarm26 Jun 2003US 2003/0117272 A1
Most cited
By later US patents
- Battery operated panic alarm wrist watch22US 4,591,836 A1986
- Arrangement for and method of waking a sleeper21US 5,144,600 A1992
- Digital clock7US 3,953,965 AKabushiki Kaisha Tamura Denki Seisakusho · 1976
- Alarm clock timer3US 3,930,360 AGeneral Electric Company · 1976
- Alarm clock construction3US 4,213,291 ARobertshaw Controls Company · 1980