Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871064 | Cassette storage container | Bruce A. Hehn, James T. Weisburn, Mark W. Geis | 1989-10-03 |
| 4854827 | Sanitary pump station | Edward McKiernan, James A. Sigler, Richard W. Sprang, Mark W. Geis | 1989-08-08 |