E21D 9/14
Layout of tunnels or galleries
Official title: Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
E21D9/14 (Layout of tunnels or galleries) appears on 34 US grants and 46 published applications in this corpus.
Search patents in E21D- Granted patents
- 34
- Published applications
- 46
- Assignees
- 38
- Inventors
- 148
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 7 |
| 2016 | 3 | 0 |
| 2017 | 1 | 2 |
| 2018 | 3 | 3 |
| 2019 | 3 | 5 |
| 2020 | 1 | 0 |
| 2021 | 2 | 3 |
| 2022 | 1 | 3 |
| 2023 | 4 | 5 |
| 2024 | 5 | 4 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for parameters of cross sections of single-hole four-lane highway tunnel17 Dec 2024US 12,169,668 B2Chang An University
- Method of buffer layer with critical deformation of tunnel initial support as control target10 Dec 2024US 12,163,429 B1Research Institute of Highway Ministry of Transport
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- Gradient lining structure of traffic tunnel crossing active fault and construction method thereof18 Jun 2026US 2026/0168379 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Jacking system for excavation construction of cross passage and construction method using the same4 Sep 2025US 2025/0277447 A1Ningbo Yonggong Technology Co., Ltd.
- Method for selecting parameters for tunnel support based on engineering-oriented behavior discrimination of surrounding rock12 Dec 2024US 2024/0410280 A1Beijing Urban Construction Design & Development Group Co., Limited
- Roadway conduit systems and methods31 Oct 2024US 2024/0360759 A1Electricwaze LLC
Most cited
By later US patents
- Method and system for mining hydrocarbon-containing materials34US 6,929,330 B2Oil Sands Underground Mining, Inc. · 2005
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- Method and system for mining hydrocarbon-containing materials17US 6,869,147 B2Oil Sands Underground Mining, Inc. · 2005
- Earth retaining end element for use with overfilled load support structures10US 4,537,529 A1985
- Method of roof control in an underground mine6US 5,824,912 AJennmar Corporation · 1998