Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12404648 | Trench box including modular panels and method of use thereof | — | 2025-09-02 |
| 12240740 | Method and apparatus for operating a slew bearing | Richard A. Schley, Andrew A. Pirigyi | 2025-03-04 |
| 12116247 | Open column jib crane | — | 2024-10-15 |
| 11072517 | Jib crane with tension frame and compression support | — | 2021-07-27 |
| 9567855 | Hydraulic cylinder safety stop | — | 2017-02-14 |
| 9518402 | Anchoring system | Robert Kundel, Jr., Richard A. Schley | 2016-12-13 |
| 8156707 | Structural members for forming various composite structures | Robert Kundel, Jr., Richard A. Schley, Chris Welker | 2012-04-17 |
| 8151463 | Process for making a panel for supporting the walls of an excavation | — | 2012-04-10 |
| 8037658 | Structural members for forming various composite structures | Robert Kundel, Jr., Richard A. Schley, Chris Welker | 2011-10-18 |
| 7837413 | Adjustable trench box and spreader bar | — | 2010-11-23 |
| 7661908 | Trench shield with adjustable vertical panels | — | 2010-02-16 |
| 7611308 | Panel for supporting the walls of an excavation | — | 2009-11-03 |
| 7402003 | Trench box moving apparatus and method | — | 2008-07-22 |
| 6499408 | Rail support assembly for monorail crane | — | 2002-12-31 |
| 6443665 | Trench shielding and shoring device | — | 2002-09-03 |
| 5669518 | Modular lift rail system | — | 1997-09-23 |
| 5669738 | Modular trench box sheeting | — | 1997-09-23 |
| 5533838 | Modular trench box sheeting | — | 1996-07-09 |