Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5501177 | Animal watering valve | William E. Edstrom, Sr. | 1996-03-26 |
| 5337696 | Animal watering system and watering valve usable therewith | William E. Edstrom, Sr., Edward T. Froehlich | 1994-08-16 |