B42F 13/00
Filing appliances with means for engaging perforations or slots
Official title: Filing appliances with means for engaging perforations or slots (B42F17/00 takes precedence; indexing features B42F21/00)
B42F13/00 (Filing appliances with means for engaging perforations or slots) appears on 1,112 US grants and 696 published applications in this corpus.
Search patents in B42F- Granted patents
- 1,112
- Published applications
- 696
- Assignees
- 345
- Inventors
- 1,416
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 12 | 0 |
| 1980 | 18 | 0 |
| 1981 | 19 | 0 |
| 1982 | 12 | 0 |
| 1983 | 16 | 0 |
| 1984 | 17 | 0 |
| 1985 | 17 | 0 |
| 1986 | 27 | 0 |
| 1987 | 25 | 0 |
| 1988 | 25 | 0 |
| 1989 | 32 | 0 |
| 1990 | 29 | 0 |
| 1991 | 35 | 0 |
| 1992 | 28 | 0 |
| 1993 | 31 | 0 |
| 1994 | 25 | 0 |
| 1995 | 23 | 0 |
| 1996 | 20 | 0 |
| 1997 | 41 | 0 |
| 1998 | 43 | 0 |
| 1999 | 46 | 0 |
| 2000 | 45 | 0 |
| 2001 | 50 | 12 |
| 2002 | 33 | 35 |
| 2003 | 29 | 47 |
| 2004 | 21 | 41 |
| 2005 | 22 | 60 |
| 2006 | 19 | 45 |
| 2007 | 13 | 59 |
| 2008 | 15 | 45 |
| 2009 | 19 | 46 |
| 2010 | 39 | 37 |
| 2011 | 20 | 24 |
| 2012 | 17 | 33 |
| 2013 | 21 | 29 |
| 2014 | 17 | 40 |
| 2015 | 17 | 32 |
| 2016 | 24 | 20 |
| 2017 | 25 | 20 |
| 2018 | 23 | 16 |
| 2019 | 18 | 11 |
| 2020 | 23 | 16 |
| 2021 | 8 | 11 |
| 2022 | 5 | 5 |
| 2023 | 5 | 5 |
| 2024 | 5 | 1 |
| 2025 | 6 | 2 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B42F 13/16Filing appliances with means for engaging perforations or slots: with claws or407
- B42F 13/0006Covers for loose-leaf binders339
- B42F 13/40Combined or formed with other articles217
- B42F 13/02Filing appliances with means for engaging perforations or slots: with flexible or143
- B42F 13/12Filing appliances with means for engaging perforations or slots: with pillars, posts98
- B42F 13/36Locking followers32
- B42F 13/30Filing appliances with means for engaging perforations or slots: having a set21
- B42F 13/38Expansible cover splines or spines11
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Most cited
By later US patents