E21D 9/12
Devices for removing or hauling away excavated material or spoil
Official title: Devices for removing or hauling away excavated material or spoil; Working or loading platforms (underground transport E21F13/00)
E21D9/12 (Devices for removing or hauling away excavated material or spoil) appears on 170 US grants and 73 published applications in this corpus.
Search patents in E21D- Granted patents
- 170
- Published applications
- 73
- Assignees
- 112
- Inventors
- 424
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 9 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 3 |
| 2002 | 3 | 1 |
| 2003 | 1 | 3 |
| 2004 | 0 | 2 |
| 2005 | 2 | 3 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 3 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 1 |
| 2013 | 3 | 3 |
| 2014 | 4 | 0 |
| 2015 | 1 | 3 |
| 2016 | 1 | 4 |
| 2017 | 3 | 6 |
| 2018 | 2 | 4 |
| 2019 | 7 | 5 |
| 2020 | 5 | 2 |
| 2021 | 2 | 6 |
| 2022 | 9 | 5 |
| 2023 | 3 | 3 |
| 2024 | 6 | 6 |
| 2025 | 3 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tunneling system28 Jul 2026US 12,692,790 B2Ccteg Taiyuan Research Institute
- Tunnel tunneling system3 Mar 2026US 12,565,837 B2Ccteg Taiyuan Research Institute
- Drill head for creating a borehole in the ground4 Nov 2025US 12,460,487 B2Herrenknecht AG
- Device and method for driving a tunnel15 Jul 2025US 12,359,566 B2Herrenknecht AG
- Tunnel boring machine for excavating semicircular-arched tunnels8 Jul 2025US 12,352,170 B2Robbins Mining, Inc.
- Tunnel construction method and machine9 Apr 2026US 2026/0098474 A1MACCAFERRI TUNNELING S.r.l.
- Tunnel boring machine for excavating semicircular-arched tunnels1 Jan 2026US 2026/0002445 A1Robbins Mining, Inc.
- Excavated matter conveyance system inside driftway9 Oct 2025US 2025/0314173 A1Komatsu Ltd.
- Rebar carriage for the construction of concrete structures3 Jul 2025US 2025/0215707 A1Grupo Empresarial Tecozam SL
- Tunnel boring machine for excavating semicircular-arched tunnels1 Aug 2024US 2024/0254879 A1Robbins Mining, Inc.
Most cited
By later US patents
- Horizontal remote mining system, and method120US 5,879,057 AAmvest Corporation · 1999
- Mobile mining machine and method77US 4,548,442 AThe Robbins Company · 1985
- Method and system for mining hydrocarbon-containing materials34US 6,929,330 B2Oil Sands Underground Mining, Inc. · 2005
- Method and system for mining hydrocarbon-containing materials29US 6,554,368 B2Oil Sands Underground Mining, Inc. · 2003
- Tunnel boring machine26US 4,494,799 AHarrison Western Corporation · 1985