Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8434266 | Sealing arrangement for door operating apparatus retrofit kit | — | 2013-05-07 |
| 8434268 | Method for installing door operating apparatus | — | 2013-05-07 |
| 8375636 | Adjustable spindle arrangement for door operating apparatus retrofit kit | — | 2013-02-19 |
| 8091283 | Adjustable spindle arrangement for door operating apparatus retrofit kit | — | 2012-01-10 |
| 6176044 | Underground door operating apparatus and method | Edward Preston Murphy | 2001-01-23 |