Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4981226 | Merchandise display assembly | Robert H. Shallenberg | 1991-01-01 |
| 4429432 | Sanitizer attachment for a mobile floor cleaner | William M. Copeland, Roland A. Blomgren | 1984-02-07 |
| 4270238 | Cleaning tool | Roland A. Blomgren | 1981-06-02 |