Issued Patents All Time
Showing 1–25 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12089383 | Expansion joint sealing system having shielding properties | William Witherspoon | 2024-09-10 |
| 11459748 | Fire resistant expansion joint systems | William Witherspoon | 2022-10-04 |
| 11180995 | Water and/or fire resistant tunnel expansion joint systems | William Witherspoon | 2021-11-23 |
| 10934704 | Fire and/or water resistant expansion joint system | Bill Witherspoon | 2021-03-02 |
| 10851542 | Fire and water resistant, integrated wall and roof expansion joint seal system | Walter C. Jones, Bill Witherspoon | 2020-12-01 |
| 10794056 | Water and/or fire resistant expansion joint system | William Witherspoon | 2020-10-06 |
| 10787805 | Fire and/or water resistant expansion and seismic joint system | Bill Witherspoon | 2020-09-29 |
| 10787806 | Fire and/or water resistant expansion and seismic joint system | Bill Witherspoon | 2020-09-29 |
| 10570611 | Method of making a water resistant expansion joint system | Bill Witherspoon | 2020-02-25 |
| 10544582 | Expansion joint system | William Witherspoon | 2020-01-28 |
| 10519651 | Fire resistant tunnel expansion joint systems | William Witherspoon | 2019-12-31 |
| 10422127 | Precompressed foam expansion joint system transition | Bill Witherspoon | 2019-09-24 |
| 10316661 | Water and/or fire resistant tunnel expansion joint systems | William Witherspoon | 2019-06-11 |
| 10179993 | Water and/or fire resistant expansion joint system | William Witherspoon | 2019-01-15 |
| 10072413 | Precompressed foam expansion joint system transition | Bill Witherspoon | 2018-09-11 |
| 10066387 | Precompressed foam expansion joint system transition | Bill Witherspoon | 2018-09-04 |
| 9963872 | Expansion joint system | William Witherspoon | 2018-05-08 |
| 9850662 | Flexible expansion joint seal | — | 2017-12-26 |
| 9739050 | Flexible expansion joint seal system | Walter C. Jones | 2017-08-22 |
| 9689158 | Fire and water resistant expansion and seismic joint system | Bill Witherspoon | 2017-06-27 |
| 9689157 | Fire and water resistant expansion and seismic joint system | Bill Witherspoon | 2017-06-27 |
| 9677266 | Movement-compensating plate anchor | William Witherspoon | 2017-06-13 |
| 9670666 | Fire and water resistant expansion joint system | Bill Witherspoon | 2017-06-06 |
| 9637915 | Factory fabricated precompressed water and/or fire resistant expansion joint system transition | Bill Witherspoon | 2017-05-02 |
| 9631362 | Precompressed water and/or fire resistant tunnel expansion joint systems, and transitions | William Witherspoon | 2017-04-25 |