G04C 21/30
With provision for a number of operations at different times
Official title: with provision for a number of operations at different times, e.g. ringing the bells in a school
G04C21/30 (With provision for a number of operations at different times) appears on 6 US grants and 4 published applications in this corpus.
Search patents in G04C- Granted patents
- 6
- Published applications
- 4
- Assignees
- 5
- Inventors
- 17
- Latest grant
- 27 Feb 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Wearable electronic device and event-intimating method of the same27 Feb 2018US 9,904,255 B2HTC Corporation
- Medication reminder4 Dec 2001US 6,325,534 B1
- Bell-striking clock30 Jun 1981US 4,276,625 AKundo-Kieninger & Obergfell
- Device for electroconductive connection and reading23 Aug 1977US 4,044,229 A
- Remote control programming system23 Mar 1976US 3,946,314 AIndustrias Rumbo, S.A.
- Timepiece comprising azan analog counter3 Aug 2023US 2023/0244187 A1
- Method for determining the risk of a user waking up in an undesirable state29 Apr 2021US 2021/0121657 A1Koninklijke Philips N. V.
- Wearable electronic device and event-intimating method of the same24 Mar 2016US 2016/0085216 A1HTC Corporation
- Paint applicator12 Apr 2012US 2012/0087712 A1Black & Decker Inc.
Most cited
By later US patents
- Medication reminder45US 6,325,534 B12001
- Device for electroconductive connection and reading30US 3,934,120 A1976
- Device for electroconductive connection and reading12US 4,044,229 A1977
- Bell-striking clock2US 4,276,625 AKundo-Kieninger & Obergfell · 1981
- Remote control programming system1US 3,946,314 AIndustrias Rumbo, S.A. · 1976