E21C 25/06
Machines slitting solely by one or more cutting rods or cutting drums
Official title: Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
E21C25/06 (Machines slitting solely by one or more cutting rods or cutting drums) appears on 255 US grants and 192 published applications in this corpus.
Search patents in E21C- Granted patents
- 255
- Published applications
- 192
- Assignees
- 97
- Inventors
- 418
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 9 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 2 |
| 2005 | 3 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 2 |
| 2008 | 2 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 2 | 6 |
| 2013 | 6 | 8 |
| 2014 | 8 | 16 |
| 2015 | 12 | 14 |
| 2016 | 13 | 19 |
| 2017 | 14 | 36 |
| 2018 | 22 | 22 |
| 2019 | 35 | 10 |
| 2020 | 17 | 15 |
| 2021 | 9 | 11 |
| 2022 | 12 | 9 |
| 2023 | 6 | 2 |
| 2024 | 3 | 7 |
| 2025 | 6 | 2 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Mining vehicle for cobalt-rich crust from the seabed11 Aug 2026US 12,704,066 B2Qingdao University of Science and Technology
- Tunneling system28 Jul 2026US 12,692,790 B2Ccteg Taiyuan Research Institute
- Rolling wedge cutter drum30 Jun 2026US 12,668,933 B1
- Bolter miner and tunneling system31 Mar 2026US 12,590,540 B2Ccteg Taiyuan Research Institute
- Tunnel tunneling system3 Mar 2026US 12,565,837 B2Ccteg Taiyuan Research Institute
- Rolling Wedge Cutter Drum1 Oct 2026US 2026/0297869 A1
- Method and material removal system14 May 2026US 2026/0132715 A1Rockfeel GmbH
- Roadheader and cutter head therefor9 Oct 2025US 2025/0314172 A1Sandvik Mining and Construction Oy
- Mining vehicle for cobalt-rich crust from the seabed31 Jul 2025US 2025/0243757 A1Qingdao University of Science and Technology
- Cutting assembly for longwall mining system3 Oct 2024US 2024/0328315 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Mounting means for pick on mining drum vane68US 4,268,089 AWinster Mining Limited · 1981
- Cutting apparatus having means for shielding cutting tool holders56US 6,779,850 B1Anthony Richard Schibeci Watsonia · 2004
- Superhard composite material bonded to a steel body55US 7,568,770 B22009
- Cutter drum for pavement profiler39US 4,697,850 ADynapac Mfg. Inc. · 1987
- Flighting and tool holder31US 7,338,134 B2Keystone Engineering & Manufacturing Corporation · 2008