Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D354142 | Portable restroom | George E. McNamara, Ronald J. Holmstadt, Douglas W. Hart, Douglas E. Loebertmann, John E. Paul | 1995-01-03 |
| D300351 | Urinal | Duane T. Tegg | 1989-03-21 |
| 4689917 | Building wall panel and door unit | Frederic Wagner, Leo F. Wildgen | 1987-09-01 |
| 4670918 | Urinal for use with a portable toilet structure | Duane T. Tegg | 1987-06-09 |
| D288718 | Building door unit | Duane T. Tegg | 1987-03-10 |
| 4574025 | Method of forming an end panel for a building and door unit | Fredric M. Wagner, Leo F. Wildgen | 1986-03-04 |
| D282782 | Combined building wall and door unit | Fredric M. Wagner, Leo F. Wildgen | 1986-02-25 |
| D256153 | Portable chemical toilet tank | Leo F. Wildgen | 1980-07-29 |