H05B 41/325
By measuring the incident light
Official title: {by measuring the incident light}
H05B41/325 (By measuring the incident light) appears on 192 US grants and 40 published applications in this corpus.
Search patents in H05B- Granted patents
- 192
- Published applications
- 40
- Assignees
- 58
- Inventors
- 233
- Latest grant
- 15 Mar 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 8 | 0 |
| 1982 | 11 | 0 |
| 1983 | 10 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 11 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 2 |
| 2002 | 5 | 13 |
| 2003 | 11 | 5 |
| 2004 | 10 | 3 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 3 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 3 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Image pickup apparatus that controls flash emission amount at photographing and control method therefor15 Mar 2022US 11,275,289 B2Canon Kabushiki Kaisha
- Lighting system and control thereof3 Aug 2021US 11,079,658 B2Rotolight Limited
- Photographing system for setting light emission amount of strobe, illumination apparatus, and control method11 May 2021US 11,006,027 B2Canon Kabushiki Kaisha
- Color temperature control of flash units28 Jul 2020US 10,728,964 B2Bron Elektronik AG
- Lighting system and control thereof31 Mar 2020US 10,606,150 B2Rotolight Limited
- Lighting system and control thereof28 Oct 2021US 2021/0333691 A1Rotolight Limited
- Image pickup apparatus that controls flash emission amount at photographing and control method therefor4 Mar 2021US 2021/0063844 A1Canon Kabushiki Kaisha
- Lighting system and control thereof2 Jul 2020US 2020/0209716 A1Rotolight Limited
- Photographing system for setting light emission amount of strobe, illumination apparatus, and control method18 Jun 2020US 2020/0195821 A1Canon Kabushiki Kaisha
- Light-emitting apparatus for shooting with flash, charging control method therefor, and storage medium10 Oct 2019US 2019/0313004 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Constant light intensity electronic flash device75US 4,275,335 AMinolta Camera Kabushiki Kaisha · 1981
- Electronic flash and a camera provided with the same49US 5,895,128 AMinolta Co., Ltd. · 1999
- Electronic pulse width controller for flashlamp pumped lasers44US 5,255,277 AWhittaker Ordnance, Inc. · 1993
- Flash photography system38US 6,718,135 B2PENTAX Corporation · 2004
- Slave flash controlling device and slave flash device32US 6,798,986 B2Nikon Corporation · 2004