G04C 13/04
Primary clocks
G04C13/04 (Primary clocks) appears on 6 US grants and 4 published applications in this corpus.
Search patents in G04C- Granted patents
- 6
- Published applications
- 4
- Assignees
- 6
- Inventors
- 15
- Latest grant
- 13 Feb 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 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 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 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 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electronic watch, motor control circuit, and method for controlling electronic watch13 Feb 2024US 11,899,405 B2Seiko Epson Corporation
- Timepiece comprising a device for switching a mechanism of said timepiece18 Sep 2018US 10,078,310 B2Montres Breguet S. A.
- Impulse clock system15 Aug 1995US 5,442,599 ANational Time & Signal Corporation
- Impulse clock system25 Jan 1994US 5,282,180 ANational Time & Signal Corporation
- Switch assembly for maintaining an electric time switch clock synchronized with real time22 Jul 1986US 4,602,165 A
- Tower clock and procedure for its operation2 Apr 2026US 2026/0093211 A1
- Timepiece, display control method, and storage medium11 Sep 2025US 2025/0284246 A1Casio Computer Co., Ltd.
- Electronic watch, motor control circuit, and method for controlling electronic watch24 Dec 2020US 2020/0401086 A1Seiko Epson Corporation
- Timepiece comprising a device for switching a mechanism of said timepiece4 Jan 2018US 2018/0004165 A1Montres Breguet S. A.
Most cited
By later US patents
- Redundant clock system utilizing nonsynchronous oscillators29US 4,254,492 ARockwell International Corporation · 1981
- Impulse clock system14US 5,442,599 ANational Time & Signal Corporation · 1995
- Impulse clock system12US 5,282,180 ANational Time & Signal Corporation · 1994
- Switch assembly for maintaining an electric time switch clock synchronized with real time2US 4,602,165 A1986