Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5081505 | Cleaning apparatus having indexable wiper blades | Conrad Altmann | 1992-01-14 |
| 5040030 | Precise loading blade and method for making same | — | 1991-08-13 |
| 4903084 | Cleaning apparatus having an interference-fit housing | Leon A. Baltrus, Clyde M. Creveling, Donald G. McKeown, Thomas E. Reding, David L. Thompson | 1990-02-20 |
| 4851880 | Cleaning apparatus having airfoils | Carl R. Bothner | 1989-07-25 |