H04N 1/40056
Circuits for driving or energising particular reading heads or original illumination means
Official title: {Circuits for driving or energising particular reading heads or original illumination means (H04N1/401, H04N1/407 take precedence)}
H04N1/40056 (Circuits for driving or energising particular reading heads or original illumination means) appears on 615 US grants and 333 published applications in this corpus.
Search patents in H04N- Granted patents
- 615
- Published applications
- 333
- Assignees
- 186
- Inventors
- 1,020
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 12 | 0 |
| 1987 | 40 | 0 |
| 1988 | 25 | 0 |
| 1989 | 29 | 0 |
| 1990 | 21 | 0 |
| 1991 | 18 | 0 |
| 1992 | 11 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 13 | 0 |
| 1998 | 18 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 12 | 11 |
| 2002 | 9 | 18 |
| 2003 | 15 | 14 |
| 2004 | 16 | 13 |
| 2005 | 8 | 16 |
| 2006 | 14 | 13 |
| 2007 | 9 | 24 |
| 2008 | 13 | 12 |
| 2009 | 12 | 8 |
| 2010 | 12 | 18 |
| 2011 | 9 | 15 |
| 2012 | 14 | 22 |
| 2013 | 22 | 26 |
| 2014 | 33 | 11 |
| 2015 | 21 | 12 |
| 2016 | 12 | 7 |
| 2017 | 17 | 32 |
| 2018 | 20 | 22 |
| 2019 | 21 | 7 |
| 2020 | 8 | 6 |
| 2021 | 4 | 7 |
| 2022 | 10 | 7 |
| 2023 | 4 | 5 |
| 2024 | 3 | 4 |
| 2025 | 3 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Image forming apparatus and controlling method for the same29 Sep 2026US 12,750,451 B2Canon Kabushiki Kaisha
- Image reading device, image forming apparatus, non-transitory computer readable medium storing image reading program, and image reading method reducing image reading time by sequentially switching light sources turning on second light source for shorter time than first light source16 Dec 2025US 12,500,987 B2FUJIFILM Business Innovation Corp.
- Information processing apparatus, method, and computer-readable medium20 May 2025US 12,307,734 B2Canon Kabushiki Kaisha
- Image processor, image forming apparatus, and image processing method15 Apr 2025US 12,279,027 B2Ricoh Company, Ltd.
- Image forming apparatus and controlling method for the same15 Oct 2024US 12,120,280 B2Canon Kabushiki Kaisha
- Image reading apparatus including two irradiation units that irradiate with light26 Mar 2026US 2026/0089285 A1Canon Kabushiki Kaisha
- Image processing apparatus, reading device, image forming apparatus, image processing method, and recording medium10 Jul 2025US 2025/0227189 A1
- Image forming apparatus and controlling method for the same2 Jan 2025US 2025/0008039 A1Canon Kabushiki Kaisha
- Image reading apparatus for reading a document, and image forming system28 Nov 2024US 2024/0397007 A1Canon Kabushiki Kaisha
- Image reading apparatus, method for controlling the same, and storage medium29 Feb 2024US 2024/0073340 A1Canon Kabushiki Kaisha
Most cited
By later US patents
- Digitizing scanner232US 6,606,171 B1Howtek, Inc. · 2003
- Adaptive image acquisition system198US 4,949,391 AEverex Ti Corporation · 1990
- Lamp control scheme for rapid warmup of fluorescent lamp in office equipment160US 5,907,742 AHewlett-Packard Company · 1999
- Instant electronic camera147US 4,074,324 A1978
- LED array and partitive driving method therefor using overlapping activation periods138US 5,063,462 ACanon Kabushiki Kaisha · 1991