B42F 13/22
In two sections engaging each other when closed
Official title: in two sections engaging each other when closed
B42F13/22 (In two sections engaging each other when closed) appears on 286 US grants and 266 published applications in this corpus.
Search patents in B42F- Granted patents
- 286
- Published applications
- 266
- Assignees
- 87
- Inventors
- 310
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 8 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 1 |
| 2002 | 5 | 6 |
| 2003 | 4 | 15 |
| 2004 | 3 | 8 |
| 2005 | 4 | 23 |
| 2006 | 4 | 19 |
| 2007 | 6 | 32 |
| 2008 | 8 | 25 |
| 2009 | 12 | 24 |
| 2010 | 23 | 16 |
| 2011 | 12 | 11 |
| 2012 | 8 | 14 |
| 2013 | 15 | 6 |
| 2014 | 7 | 15 |
| 2015 | 9 | 16 |
| 2016 | 8 | 9 |
| 2017 | 13 | 7 |
| 2018 | 10 | 6 |
| 2019 | 5 | 2 |
| 2020 | 11 | 6 |
| 2021 | 4 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 2 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ring binder mechanism3 Mar 2026US 12,565,059 B1Navneet Education Limited
- Folder folder5 Aug 2025US 12,377,676 B2ACCO Brands Corporation
- 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
- 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
- Notebook hanger3 Jun 2021US 2021/0162796 A1World Wide Stationery Mfg. Co., Ltd.
Most cited
By later US patents