Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9045906 | Roof opening guard rail system | Roy G. Parton | 2015-06-02 |
| 8579081 | Remote controlled overhead ladder system | Roy G. Parton | 2013-11-12 |
| 7621374 | Sectional overhead ladder with a fold assist feature | — | 2009-11-24 |
| 5193138 | Off-peak thermal storage system providing a plurality of selected temperature outlets | Richard MacDonald, Jimmy F. Mathis | 1993-03-09 |