G04C 19/02
Producing optical time signals at prefixed times by electric means: by electric
Official title: by electric lamps
G04C19/02 (Producing optical time signals at prefixed times by electric means: by electric) appears on 22 US grants and 25 published applications in this corpus.
Search patents in G04C- Granted patents
- 22
- Published applications
- 25
- Assignees
- 15
- Inventors
- 45
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 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 | 1 | 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 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 4 |
| 2013 | 3 | 0 |
| 2014 | 1 | 2 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 3 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 2 | 2 |
| 2024 | 1 | 1 |
| 2025 | 0 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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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
- Night light wake up indicator14US 8,018,327 B2Good Nite Lite, LLC · 2011
- Multifunction sleep training device with remote locking mechanism and methods of operation thereof6US 11,529,493 B2Hatch Baby, Inc. · 2022