E21D 9/004
Using light beams for direction or position control
Official title: {using light beams for direction or position control}
E21D9/004 (Using light beams for direction or position control) appears on 35 US grants and 27 published applications in this corpus.
Search patents in E21D- Granted patents
- 35
- Published applications
- 27
- Assignees
- 28
- Inventors
- 117
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 5 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 2 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 3 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 4 | 2 |
| 2020 | 0 | 1 |
| 2021 | 2 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 0 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Navigation of an underground mining machine18 Nov 2025US 12,475,595 B2Commonwealth Scientific and Industrial Research Organisation
- Methods for real-time deviation monitoring of miniature pipe roofing jacking pipe of spiral soil-discharging19 Aug 2025US 12,392,609 B2Cccc First Harbor Engineering Co., Ltd.
- Method and device for the automated arrangement of tunnel lining segments27 Feb 2024US 11,913,337 B2Herrenknecht AG
- Machine guidance integration22 Nov 2022US 11,506,053 B2Commonwealth Scientific and Industrial Research Organisation
- Lidar-based convergence deformation monitoring system for surrounding rock around TBM shield region8 Nov 2022US 11,492,905 B2Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Methods for real-time deviation monitoring of miniature pipe roofing jacking pipe of spiral soil-discharging17 Jul 2025US 2025/0231026 A1Cccc First Harbor Engineering Co., Ltd.
- Method and device for the automated arrangement of tunnel lining segments21 Sep 2023US 2023/0296022 A1Herrenknecht AG
- Navigation of an underground mining machine17 Aug 2023US 2023/0260153 A1Commonwealth Scientific and Industrial Research Organisation
- Machine guidance integration21 Jan 2021US 2021/0017859 A1Commonwealth Scientific and Industrial Research Organisation
- Lidar-based convergence deformation monitoring system for surrounding rock around tbm shield region18 Jun 2020US 2020/0191965 A1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
Most cited
By later US patents
- Automated guided apparatus suitable for toping applications88US 6,349,249 B1Inco Limited · 2002
- Apparatus for detecting position of underground excavator and magnetic field producing cable73US 5,240,350 AKabushiki Kaisha Komatsu Seisakusho · 1993
- Guide beam direction setting apparatus46US 5,936,721 ATopcon Corporation · 1999
- Method and control system to limit shifting movement of a winning tool for a tunneling machine29US 4,027,210 AGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. · 1977
- Guidance system and method for keeping a tunnel boring machine continuously on a plan line27US 5,529,437 A1996