Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4292176 | Use of activated carbon in waste water treating process | James F. Grutsch | 1981-09-29 |
| 4274968 | Process for the purification of water | James F. Grutsch, Joe D. Walk | 1981-06-23 |