B21D 28/30
In annular parts
Official title: in annular parts, e.g. rims
B21D28/30 (In annular parts) appears on 29 US grants and 11 published applications in this corpus.
Search patents in B21D- Granted patents
- 29
- Published applications
- 11
- Assignees
- 19
- Inventors
- 69
- Latest grant
- 17 Jan 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 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 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 3 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 2 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for manufacturing brake disc and brake disc17 Jan 2023US 11,554,407 B2Sunstar Engineering Inc.
- Forging and inclined window hole punching composite die21 Dec 2021US 11,203,052 B2CITIC Dicastal Co., Ltd.
- Tool-transition-free machining method and clamp for wheel outer rim27 Jul 2021US 11,072,014 B2CITIC Dicastal Co., Ltd.
- Grounding spacer22 Sep 2020US 10,784,596 B2A K Stamping Co. Inc.
- Grounding spacer7 Apr 2020US 10,615,520 B2A K Stamping Co. Inc.
- Method for manufacturing brake disc and brake disc24 Mar 2022US 2022/0088667 A1Sunstar Engineering Inc.
- Forging and inclined window hole punching composite die20 Aug 2020US 2020/0261963 A1CITIC Dicastal Co., Ltd.
- Tool-transition-free machining method and clamp for wheel outer rim14 May 2020US 2020/0147667 A1CITIC Dicastal Co., Ltd.
- Method and system for producing ring-shaped member for vehicle, and synchronizer ring2 Aug 2018US 2018/0214925 A1Nsk Ltd.
- Grounding Spacer24 Aug 2017US 2017/0244180 A1A K Stamping Co. Inc.
Most cited
By later US patents
- Piercing apparatus104US 4,038,894 ASpringfield Tool & Die, Inc. · 1977
- Method and apparatus for reforming can bottom to provide improved strength49US 5,697,242 AAmerican National Can Company · 1997
- Method and apparatus for reforming can bottom to provide improved strength42US 5,222,385 AAmerican National Can Company · 1993
- Device for punching holes in a bicycle rim32US 5,896,796 A1999
- Method and apparatus for processing containers28US 5,349,837 A1994