G04C 19/00
Producing optical time signals at prefixed times by electric means
G04C19/00 (Producing optical time signals at prefixed times by electric means) appears on 37 US grants and 41 published applications in this corpus.
Search patents in G04C- Granted patents
- 37
- Published applications
- 41
- Assignees
- 23
- Inventors
- 62
- Latest grant
- 11 Aug 2026
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 | 1 | 0 |
| 1984 | 1 | 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 | 2 | 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 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 4 |
| 2013 | 3 | 0 |
| 2014 | 1 | 3 |
| 2015 | 2 | 3 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 3 | 3 |
| 2021 | 0 | 2 |
| 2022 | 2 | 2 |
| 2023 | 3 | 3 |
| 2024 | 3 | 1 |
| 2025 | 0 | 2 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Organic-light emitting diode11 Aug 2026US 12,704,230 B2Pictiva Displays International Limited
- Multifunction sleep training device with remote locking mechanism and methods of operation thereof31 Mar 2026US 12,589,217 B2Hatch Baby, Inc.
- Clock device with automatic simulation of sunrise or sunset24 Mar 2026US 12,585,227 B2Lutron Technology Company LLC
- Organic-light emitting diode3 Dec 2024US 12,158,250 B2Pictiva Displays International Limited
- Watch, pointer control method, and non-transitory recording medium6 Aug 2024US 12,055,899 B2Casio Computer Co., Ltd.
- Organic-light emitting diode1 Oct 2026US 2026/0298429 A1Pictiva Displays International Limited
- Multifunction sleep training device with remote locking mechanism and methods of operation thereof9 Jul 2026US 2026/0192082 A1Hatch Baby, Inc.
- Clock Device with Automatic Simulation of Sunrise or Suset2 Jul 2026US 2026/0186448 A1Lutron Technology Company LLC
- Electromechanical Display Systems and Methods15 Jan 2026US 2026/0016791 A1
- Timer with a sound generator8 Jan 2026US 2026/0010121 A1
Most cited
By later US patents
- Reminder clock126US 5,199,009 A1993
- Lighting device and method for producing sequential lighting stimuli27US 8,427,311 B2Koninklijke Philips Electronics N. V. · 2013
- Organic-light-emitting diode and luminaire23US 9,797,567 B2OSRAM OLED GmbH · 2017
- Analog electronic watch with an electro-optical display device20US 5,222,053 ACasio Computer Co., Ltd. · 1993
- Quartz crystal timepiece18US 3,949,545 AKabushiki Kaisha Suwa Seikosha · 1976