G04C 13/02
Circuit arrangements
Official title: Circuit arrangements; Electric clock installations
G04C13/02 (Circuit arrangements) appears on 34 US grants and 23 published applications in this corpus.
Search patents in G04C- Granted patents
- 34
- Published applications
- 23
- Assignees
- 20
- Inventors
- 59
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 4 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 3 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G04C 13/021Primary-secondary systems using transmission of singular pulses for driving directly secondary clocks13
- G04C 13/027Primary-secondary systems using transmission of other driving signals9
- G04C 13/04Primary clocks6
- G04C 13/03Pulse transmission systems with additional means for setting the time indication of4
- G04C 13/028Transmission systems for synchronisation of pendulum of secondary clocks by pendulums of2
Recent patents
- Sympathetic timepiece assembly24 Mar 2026US 12,585,224 B2Montres Breguet S. A.
- Sympathetic timepiece assembly17 Feb 2026US 12,554,226 B2Montres Breguet S. A.
- Sympathetic timepiece assembly23 Sep 2025US 12,422,781 B2Montres Breguet S. A.
- Delay time detection circuit, stamping information generation device, and delay time detection method29 Oct 2024US 12,130,653 B2NEC Platforms, Ltd.
- Electronic watch, motor control circuit, and method for controlling electronic watch13 Feb 2024US 11,899,405 B2Seiko Epson Corporation
- 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.
- Sympathetic timepiece assembly5 Oct 2023US 2023/0315023 A1Montres Breguet S. A.
- Sympathetic timepiece assembly14 Sep 2023US 2023/0288874 A1Montres Breguet S. A.
- Sympathetic timepiece assembly7 Sep 2023US 2023/0280697 A1Montres Breguet S. A.
Most cited
By later US patents
- Residential time reference system65US 5,334,975 A1994
- Clock diagnostics56US 7,230,884 B2The Sapling Company, Inc. · 2007
- Electroptical detector for determining the position of the time display mechanism of a timepiece33US 4,645,357 AJunghans Uhren GmbH · 1987
- Redundant clock system utilizing nonsynchronous oscillators29US 4,254,492 ARockwell International Corporation · 1981
- Remotely-synchronizable time display17US 5,251,191 ADiehl GmbH & Co. · 1993