B21K 1/72
Hooks
Official title: hooks, e.g. crane hooks, railway track spikes (making nails in general B21G)
B21K1/72 (Hooks) appears on 13 US grants and 2 published applications in this corpus.
Search patents in B21K- Granted patents
- 13
- Published applications
- 2
- Assignees
- 10
- Inventors
- 18
- Latest grant
- 4 Nov 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 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 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Railroad spikes and methods of making the same4 Nov 2014US 8,875,556 B2Norfolk Southern Corporation
- Railroad spikes and methods of making the same1 Apr 2014US 8,683,842 B1Norfolk Southern Corporation
- Latch needle with improved latch bearing22 Oct 2013US 8,561,435 B2Groz-Beckert KG
- Hoist ring assembly and method11 Apr 1995US 5,405,210 ACBC Industries, Inc.
- Method and apparatus for the manufacture of J-shaped display hooks with balled ends31 Mar 1992US 5,099,674 ATrion Industries, Inc.
Most cited
By later US patents
- Hoist ring assembly and method42US 5,405,210 ACBC Industries, Inc. · 1995
- Method of manufacturing elevator links and a cast elevator link blank for use in the method24US 3,996,737 ABJ-Hughes Inc. · 1976
- Heavy duty shackle23US 4,079,584 AAmerican Hoist & Derrick Company · 1978
- Railroad spike forging machine12US 4,493,202 AStafford Rail Products, Inc. · 1985
- Method of reclaiming used railroad spikes8US 4,263,797 A1981