E21D 9/106
With percussive tools
Official title: {with percussive tools, e.g. pick-hammers}
E21D9/106 (With percussive tools) appears on 33 US grants and 10 published applications in this corpus.
Search patents in E21D- Granted patents
- 33
- Published applications
- 10
- Assignees
- 21
- Inventors
- 90
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 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 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof7 Jan 2025US 12,188,339 B2China University of Mining and Technology
- Liquid hammer drill13 Aug 2024US 12,060,775 B2
- Combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection1 Nov 2022US 11,486,249 B2Institute of Rock and Soil Mechanics, Cas
- Enhanced endcap ram accelerator system3 Nov 2020US 10,822,877 B2Hypersciences, Inc.
- Ram accelerator system with endcap9 Jul 2019US 10,344,534 B2Hypersciences, Inc.
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof28 Nov 2024US 2024/0392669 A1China University of Mining and Technology
- Liquid hammer drill24 Nov 2022US 2022/0372820 A1
- Combined rock-breaking tbm tunneling method in complex strata for realizing three-way force detection7 Jan 2021US 2021/0003009 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Vibration reduction optimization method for host system of tunnel boring machine10 Sep 2020US 2020/0285787 A1Dalian University of Technology
- Enhanced endcap ram accelerator system27 Jun 2019US 2019/0195022 A1Hypersciences, Inc.
Most cited
By later US patents
- Excavating machine26US 4,005,905 ALinden-Alimak AB · 1977
- Hammer24US 4,550,785 AConsolidated Technologies, Inc. · 1985
- Method and apparatus for drilling hard material24US 4,682,819 A1987
- Articulated support15US 3,999,805 ALockwood Bennett Ltd. · 1976
- Ground excavating apparatus14US 4,070,772 AKabushiki Kaisha Komatsu Seisakusho · 1978