B21H 3/10
Twist-drills
Official title: twist-drills; screw-taps
B21H3/10 (Twist-drills) appears on 14 US grants and 10 published applications in this corpus.
Search patents in B21H- Granted patents
- 14
- Published applications
- 10
- Assignees
- 5
- Inventors
- 22
- Latest grant
- 16 Jun 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 3 |
| 2019 | 3 | 0 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Cutting tool with enhanced chip evacuation capability and method of making same16 Jun 2020US 10,682,712 B2Kennametal Inc.
- Twist drill and production method9 Apr 2019US 10,252,321 B2Hilti Aktiengesellschaft
- Twist drill and production method2 Apr 2019US 10,245,657 B2Hilti Aktiengesellschaft
- Method of machining screw8 Jan 2019US 10,173,257 B2Nittan Valve Co., Ltd.
- Cutting tool with enhanced chip evacuation capability and method of making same8 Aug 2017US 9,724,768 B2Kennametal Inc.
- Drill Bit and Production Method21 Jun 2018US 2018/0171721 A1Hilti Aktiengesellschaft
- Method of machining screw22 Feb 2018US 2018/0050383 A1Nittan Valve Co., Ltd.
- Cutting tool with enhanced chip evacuation capability and method of making same4 Jan 2018US 2018/0001398 A1Kennametal Inc.
- Twist drill and production method7 Dec 2017US 2017/0348760 A1Hilti Aktiengesellschaft
- Twist drill and production method17 Mar 2016US 2016/0074945 A1Hilti Aktiengesellschaft
Most cited
By later US patents
- Cutting tool with enhanced chip evacuation capability and method of making same15US 10,682,712 B2Kennametal Inc. · 2020
- Twist drill13US 6,601,659 B2Hilti Aktiengesellschaft · 2003
- Method and apparatus for the production of machine tools9US 4,059,031 A1977
- Drill bit with debris conveying flute4US 5,641,028 ABlack & Decker Inc. · 1997
- Twist drill and production method3US 10,252,321 B2Hilti Aktiengesellschaft · 2019