H04N 1/401
Compensating positionally unequal response of the pick-up or reproducing head
Official title: Compensating positionally unequal response of the pick-up or reproducing head (H04N1/403 takes precedence)
H04N1/401 (Compensating positionally unequal response of the pick-up or reproducing head) appears on 1,072 US grants and 717 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,072
- Published applications
- 717
- Assignees
- 234
- Inventors
- 1,748
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 12 | 0 |
| 1986 | 12 | 0 |
| 1987 | 14 | 0 |
| 1988 | 26 | 0 |
| 1989 | 27 | 0 |
| 1990 | 27 | 0 |
| 1991 | 15 | 0 |
| 1992 | 25 | 0 |
| 1993 | 25 | 0 |
| 1994 | 21 | 0 |
| 1995 | 17 | 0 |
| 1996 | 18 | 0 |
| 1997 | 14 | 0 |
| 1998 | 39 | 0 |
| 1999 | 20 | 0 |
| 2000 | 33 | 0 |
| 2001 | 31 | 8 |
| 2002 | 26 | 36 |
| 2003 | 24 | 28 |
| 2004 | 24 | 36 |
| 2005 | 17 | 39 |
| 2006 | 28 | 53 |
| 2007 | 25 | 46 |
| 2008 | 34 | 31 |
| 2009 | 35 | 37 |
| 2010 | 36 | 34 |
| 2011 | 23 | 29 |
| 2012 | 38 | 33 |
| 2013 | 45 | 20 |
| 2014 | 38 | 22 |
| 2015 | 39 | 15 |
| 2016 | 22 | 19 |
| 2017 | 19 | 49 |
| 2018 | 38 | 38 |
| 2019 | 40 | 30 |
| 2020 | 29 | 21 |
| 2021 | 20 | 27 |
| 2022 | 17 | 16 |
| 2023 | 31 | 20 |
| 2024 | 18 | 17 |
| 2025 | 5 | 11 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Management apparatus, management method, and non-transitory computer readable medium30 Jun 2026US 12,671,777 B2FUJIFILM Business Innovation Corp.
- Optical apparatus10 Feb 2026US 12,549,674 B2FUJIFILM Business Innovation Corp.
- Light scanning apparatus and image forming apparatus16 Dec 2025US 12,500,983 B2Canon Kabushiki Kaisha
- Image processing apparatus, image processing method, non-transitory computer-readable storage medium, and image forming apparatus29 Jul 2025US 12,370,806 B2Canon Kabushiki Kaisha
- Driving device and printing apparatus having a connection circuit switching connection combinations of load blocks and driving circuits6 May 2025US 12,292,699 B2Canon Kabushiki Kaisha
- Image scanning apparatus14 May 2026US 2026/0135961 A1KYOCERA Document Solutions Inc.
- Streak-shaped defect classification method and streak-shaped defect classification system29 Jan 2026US 2026/0030868 A1SCREEN Holdings Co., Ltd.
- Image processor and computer-implemented method for a medical observation device, using a location-dependent color conversion function13 Nov 2025US 2025/0350700 A1
- Image processing apparatus, image processing method, non-transitory computer-readable storage medium, and image forming apparatus30 Oct 2025US 2025/0332844 A1Canon Kabushiki Kaisha
- Method for detecting malfunctional nozzles in a printing head and printing device9 Oct 2025US 2025/0313026 A1Bobst Mex SA
Most cited
By later US patents
- Digitizing scanner232US 6,606,171 B1Howtek, Inc. · 2003
- Image correction method and apparatus with partial detector array sampling197US 4,806,780 AKabushiki Kaisha Toshiba · 1989
- Control of a light emitting diode array192US 4,455,562 APitney Bowes Inc. · 1984
- Photographing image correction system134US 5,461,440 AOlympus Optical Co., Ltd. · 1995
- Non-impact copier/printer system communicating rosterized, printer independant data124US 5,699,102 AEastman Kodak Company · 1997