B41M 3/146
Using a non human-readable pattern which becomes visible on reproduction
Official title: {using a non human-readable pattern which becomes visible on reproduction, e.g. a void mark}
B41M3/146 (Using a non human-readable pattern which becomes visible on reproduction) appears on 78 US grants and 41 published applications in this corpus.
Search patents in B41M- Granted patents
- 78
- Published applications
- 41
- Assignees
- 34
- Inventors
- 93
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 5 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 2 | 7 |
| 2008 | 0 | 4 |
| 2009 | 1 | 0 |
| 2010 | 2 | 1 |
| 2011 | 3 | 3 |
| 2012 | 2 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 3 | 2 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 2 |
| 2020 | 4 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optical security device based on a surface of revolution19 May 2026US 12,632,002 B2Viavi Solutions Inc.
- Enhanced late point feature differentiation1 Apr 2025US 12,263,695 B2Hewlett-Packard Development Company, L. P.
- Optical security device based on a surface of revolution23 Jul 2024US 12,045,001 B2Viavi Solutions Inc.
- Enhanced late point feature differentiation20 Jun 2023US 11,679,617 B2Hewlett-Packard Development Company, L. P.
- Optical security device based on a surface of revolution19 Oct 2021US 11,150,595 B2Viavi Solutions Inc.
- Optical security device based on a surface of revolution26 Sep 2024US 2024/0319654 A1Viavi Solutions Inc.
- Enhanced late point feature differentiation31 Aug 2023US 2023/0271446 A1Hewlett-Packard Development Company, L. P.
- Optical security device based on a surface of revolution27 Jan 2022US 2022/0026844 A1Viavi Solutions Inc.
- Enhanced late point feature differentiation28 Oct 2021US 2021/0331511 A1Hewlett-Packard Development Company, L. P.
- Optical security device based on a surface of revolution13 Aug 2020US 2020/0257235 A1Viavi Solutions Inc.
Most cited
By later US patents
- Copy restrictive documents133US 5,919,730 AEastman Kodak Company · 1999
- Protected document and method of making same96US 4,310,180 ABurroughs Corporation · 1982
- Protected document bearing watermark and method of making92US 4,210,346 ABurroughs Corporation · 1980
- Document protection methods and products92US 5,788,285 A1998
- Copy indicating security device68US 5,479,507 AThomas De La Rue Limited · 1995