Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11536067 | Spring array and method for door counterbalancing | — | 2022-12-27 |
| 9890582 | Door release mechanism | Alvin Eiterman | 2018-02-13 |
| 9328547 | Door release mechanism | Alvin Eiterman | 2016-05-03 |
| 9206634 | Counterbalance system for vertical acting doors | Jorge Manuel Prieto, Charles A. Haba | 2015-12-08 |
| 8905113 | Door release mechanism | Alvin Eiterman | 2014-12-09 |
| 8770255 | Door release mechanisim | Alvin Eiterman | 2014-07-08 |
| 8397787 | Door release mechanism | Alvin Eiterman | 2013-03-19 |
| D651654 | Reinforced sign stake | — | 2012-01-03 |
| 7878230 | Door release mechanism | Alvin Eiterman | 2011-02-01 |
| 6527037 | Rolling door tensioner | Alvin Eiterman | 2003-03-04 |