B42F 13/26
And locked when so engaged
Official title: and locked when so engaged, e.g. snap-action
B42F13/26 (And locked when so engaged) appears on 214 US grants and 197 published applications in this corpus.
Search patents in B42F- Granted patents
- 214
- Published applications
- 197
- Assignees
- 68
- Inventors
- 210
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 13 | 0 |
| 1999 | 7 | 0 |
| 2000 | 6 | 0 |
| 2001 | 10 | 1 |
| 2002 | 5 | 3 |
| 2003 | 3 | 9 |
| 2004 | 2 | 4 |
| 2005 | 2 | 15 |
| 2006 | 2 | 15 |
| 2007 | 5 | 20 |
| 2008 | 4 | 17 |
| 2009 | 11 | 19 |
| 2010 | 17 | 13 |
| 2011 | 12 | 11 |
| 2012 | 7 | 10 |
| 2013 | 13 | 3 |
| 2014 | 7 | 15 |
| 2015 | 8 | 14 |
| 2016 | 8 | 8 |
| 2017 | 12 | 7 |
| 2018 | 9 | 3 |
| 2019 | 3 | 2 |
| 2020 | 9 | 4 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ring binder mechanism3 Mar 2026US 12,565,059 B1Navneet Education Limited
- Binder capable of turning paper by 360 degrees18 Mar 2025US 12,251,958 B1
- Multi-ring binder3 Jan 2023US 11,541,682 B1
- Expandable storage device5 Apr 2022US 11,292,284 B2ACCO Brands Corporation
- Systems and apparatus for covering, protecting, and concealing personal, private, confidential, and nonpublic information8 Jun 2021US 11,027,572 B2
- File12 Mar 2026US 2026/0070366 A1Kokuyo Co., Ltd.
- Ring binder mechanism5 Mar 2026US 2026/0061770 A1Navneet Education Limited
- Expandable storage device30 Dec 2021US 2021/0402823 A1ACCO Brands Corporation
- Systems and apparatus for covering and concealing printed and/or hand-written text, lettering, graphics, drawings, and/or marks on one or more sheets, pages, or pages of a book.29 Jul 2021US 2021/0229481 A1
- Systems and apparatus for covering, protecting, and concealing per-sonal, private, confidential, and nonpublic information3 Dec 2020US 2020/0376882 A1
Most cited
By later US patents
- Plastic looseleaf binder ring assembly84US 3,954,343 A1976
- Trigger mechanism for ring binder84US 4,813,803 AWilson Jones Company · 1989
- Binder mechanism82US 6,276,862 B1ACCO Brands Corporation · 2001
- Ring binder80US 5,354,142 AWorld Wide Stationery Manufacturing Company Limited · 1994
- Ring binder79US 5,180,247 AWorld Wide Stationery Manufacturing Company Limited · 1993