E21D 9/00
Tunnels or galleries, with or without linings
Official title: Tunnels or galleries, with or without linings; Methods or apparatus for making thereof (E02D29/045, E02D29/063 take precedence; linings per se E21D11/00); Layout of tunnels or galleries
E21D9/00 (Tunnels or galleries, with or without linings) appears on 1,090 US grants and 615 published applications in this corpus.
Search patents in E21D- Granted patents
- 1,090
- Published applications
- 615
- Assignees
- 557
- Inventors
- 2,596
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 49 | 0 |
| 1977 | 42 | 0 |
| 1978 | 41 | 0 |
| 1979 | 34 | 0 |
| 1980 | 26 | 0 |
| 1981 | 29 | 0 |
| 1982 | 21 | 0 |
| 1983 | 26 | 0 |
| 1984 | 21 | 0 |
| 1985 | 17 | 0 |
| 1986 | 20 | 0 |
| 1987 | 25 | 0 |
| 1988 | 22 | 0 |
| 1989 | 25 | 0 |
| 1990 | 20 | 0 |
| 1991 | 17 | 0 |
| 1992 | 24 | 0 |
| 1993 | 23 | 0 |
| 1994 | 16 | 0 |
| 1995 | 12 | 0 |
| 1996 | 8 | 0 |
| 1997 | 11 | 0 |
| 1998 | 17 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 10 | 4 |
| 2002 | 19 | 9 |
| 2003 | 8 | 8 |
| 2004 | 2 | 7 |
| 2005 | 8 | 11 |
| 2006 | 6 | 5 |
| 2007 | 3 | 13 |
| 2008 | 7 | 5 |
| 2009 | 5 | 13 |
| 2010 | 10 | 23 |
| 2011 | 5 | 10 |
| 2012 | 11 | 10 |
| 2013 | 18 | 21 |
| 2014 | 19 | 26 |
| 2015 | 25 | 30 |
| 2016 | 15 | 23 |
| 2017 | 14 | 35 |
| 2018 | 24 | 38 |
| 2019 | 48 | 37 |
| 2020 | 36 | 37 |
| 2021 | 27 | 42 |
| 2022 | 36 | 52 |
| 2023 | 46 | 48 |
| 2024 | 53 | 47 |
| 2025 | 41 | 23 |
| 2026 | 24 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21D 9/10Making by using boring or cutting machines524
- E21D 9/06Making by using a driving shield , i.e. advanced by pushing means290
- E21D 9/12Devices for removing or hauling away excavated material or spoil170
- E21D 9/003Arrangement of measuring or indicating devices for use during driving of tunnels127
- E21D 9/006Tunnels or galleries, with or without linings: by making use of blasting75
- E21D 9/005Tunnels or galleries, with or without linings: by forcing prefabricated elements through65
- E21D 9/001Improving soil or rock62
- E21D 9/14Layout of tunnels or galleries34
All 13 subgroupsShow fewer
- E21D 9/04Driving tunnels or galleries through loose materials26
- E21D 9/01Methods or apparatus for enlarging or restoring the cross-section of tunnels16
- E21D 9/02Driving inclined tunnels or galleries9
- E21D 9/008Driving transverse tunnels starting from existing tunnels8
- E21D 9/03Driving non-circular tunnels5
Recent patents
- Tunnel boring machine and method for tunneling using a tunnel boring machine29 Sep 2026US 12,747,665 B2Herrenknecht AG
- High power laser tunneling mining and construction equipment and methods of use25 Aug 2026US 12,715,063 B2Foro Energy, Inc.
- Advanced geological prediction method and system based on perception while drilling11 Aug 2026US 12,704,064 B2Shandong University
- Performance monitoring system for disc cutter of tunnel boring machine4 Aug 2026US 12,698,710 B2NK Photonics Ltd.
- Tunneling system28 Jul 2026US 12,692,790 B2Ccteg Taiyuan Research Institute
- Rolling Wedge Cutter Drum1 Oct 2026US 2026/0297869 A1
- Method and system for predicting blasting vibration inside surrounding rocks in deep buried tunnels1 Oct 2026US 2026/0298084 A1Northeastern University
- Secondary shaft completion construction method based on raise boring process1 Oct 2026US 2026/0298085 A1China Three Gorges Construction Engineering Corporation
- Hybrid Tunnel Boring Using Combination of Thermal and Mechanical Processes1 Oct 2026US 2026/0298086 A1Phoenix Boring, Inc.
- Triggering explosives in holes17 Sep 2026US 2026/0276352 A1Olitek Pty Ltd
Most cited
By later US patents
- Horizontal remote mining system, and method120US 5,879,057 AAmvest Corporation · 1999
- Automated guided apparatus suitable for toping applications88US 6,349,249 B1Inco Limited · 2002
- Mobile mining machine and method77US 4,548,442 AThe Robbins Company · 1985
- Golf club shaft and set of golf clubs73US 4,165,874 APepsiCo, Inc. · 1979
- Apparatus for detecting position of underground excavator and magnetic field producing cable73US 5,240,350 AKabushiki Kaisha Komatsu Seisakusho · 1993