G04C 13/027
Primary-secondary systems using transmission of other driving signals
Official title: {primary-secondary systems using transmission of other driving signals, e.g. coded signals}
G04C13/027 (Primary-secondary systems using transmission of other driving signals) appears on 9 US grants and 5 published applications in this corpus.
Search patents in G04C- Granted patents
- 9
- Published applications
- 5
- Assignees
- 5
- Inventors
- 15
- Latest grant
- 28 Nov 2017
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Digital-to-digital correction unit for analog clock display28 Nov 2017US 9,829,863 B1
- Wireless inductive pointer clock19 Apr 2016US 9,319,829 B1
- Master/slave clock system with automatic protocol detection and selection1 May 2007US 7,212,468 B2The Sapling Company, Inc.
- Method for timing a clock29 Oct 2002US 6,473,366 B2
- Analog radio clock with time zone conversion4 May 1999US 5,901,115 AHelmut Hechinger GmbH & Co.
- Digital-to-digital correction unit for analog clock display16 Nov 2017US 2017/0329283 A1
- Wireless inductive pointer clock5 May 2016US 2016/0127853 A1
- Universal clock16 Sep 2004US 2004/0179432 A1
- Master/slave clock system with automatic protocol detection and selection26 Aug 2004US 2004/0165480 A1The Sapling Company, Inc.
- Method for timing a clock20 Jun 2002US 2002/0075761 A1
Most cited
By later US patents
- Residential time reference system65US 5,334,975 A1994
- Digital display system12US 4,177,454 ANippon Soken, Inc. · 1979
- Analog radio clock with time zone conversion11US 5,901,115 AHelmut Hechinger GmbH & Co. · 1999
- Time signal clock5US 4,522,506 ASeikosha Co., Ltd. · 1985
- Time display system5US 4,565,454 A1986