Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4608086 | Membrane remover/etchant | — | 1986-08-26 |
| 4469525 | Membrane remover/etchant | — | 1984-09-04 |
| 4377017 | Scrubbing machine with water regeneration | Ferdinand J. Herpers, Harley E. Kroll, Alfred D. Carlson | 1983-03-22 |
| 4295244 | Scrubbing machine with water regeneration | Ferdinand J. Herpers, Harley E. Kroll, Alfred D. Carlson | 1981-10-20 |
| 4194263 | Scrubbing machine with water regeneration | Ferdinand J. Herpers, Harley E. Kroll, Alfred D. Carlson | 1980-03-25 |