B42F 13/36
Locking followers
Official title: Locking followers; Pressure bars
B42F13/36 (Locking followers) appears on 32 US grants and 28 published applications in this corpus.
Search patents in B42F- Granted patents
- 32
- Published applications
- 28
- Assignees
- 18
- Inventors
- 33
- Latest grant
- 14 Jan 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 3 |
| 2011 | 0 | 2 |
| 2012 | 3 | 4 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 2 | 5 |
| 2016 | 4 | 2 |
| 2017 | 5 | 4 |
| 2018 | 3 | 0 |
| 2019 | 0 | 0 |
| 2020 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Ring binder mechanism14 Jan 2020US 10,532,598 B2World Wide Stationery Mfg. Co., Ltd.
- Ring binder mechanism14 Jan 2020US 10,532,599 B2World Wide Stationery Mfg. Co., Ltd.
- Single-detent binder25 Dec 2018US 10,160,253 B2
- Method for assembling a single-detent binder27 Nov 2018US 10,137,724 B1
- Ring binder mechanism13 Mar 2018US 9,914,321 B2Chung Tin International, Inc.
- Single-detent binder7 Dec 2017US 2017/0348995 A1
- Ring binder mechanism20 Jul 2017US 2017/0203603 A1World Wide Stationery Mfg. Co., Ltd.
- Single-detent binder25 May 2017US 2017/0144471 A1
- Binder with a latterally adjustable spine and variable pivot hinge5 Jan 2017US 2017/0001463 A1
- Ring binder mechanism18 Aug 2016US 2016/0236505 A1Chung Tin International, Inc.
Most cited
By later US patents
- Filling device for papers69US 3,993,374 ARobert Krause GmbH & Co. KG · 1976
- Loose leaf binder lift lock60US 4,696,595 ASouth Park Sales & Mfg., Inc. · 1987
- Ring binder mechanism24US 7,731,441 B2World Wide Stationery Mfg. Co., Ltd. · 2010
- Ring binder mechanism20US 8,186,899 B2World Wide Stationery Mfg. Co., Ltd. · 2012
- Combined sheet compressor and transfer device for attachment to spaced prongs of a file folder fastener15US 4,869,613 APermclip Products Corporation · 1989