Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8220199 | Root feeder | Frank J. Walker | 2012-07-17 |
| 5975797 | Subterranean water collection and delivery device and system | Frank J. Walker | 1999-11-02 |
| 5795100 | Subterranean water collection and delivery device and system | Frank J. Walker | 1998-08-18 |