Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9453597 | Air inversion and steam cure of cured in place liners apparatus | Kurt Schlake, Joseph M. Coyne, Richard C. Polivka, Franklin Driver | 2016-09-27 |
| 6530863 | Door operator unit | Robert E. Balli | 2003-03-11 |
| 6422965 | Door operator unit | Robert E. Balli | 2002-07-23 |
| 5960849 | Cable slack detector | Robert E. Balli | 1999-10-05 |
| 4738293 | Ball hitch cover | Raymond Ostrom | 1988-04-19 |