Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695127 | Constant-flow irrigation tape and method of making | William A. Delmer, Daniel W. C. Delmer, Robert Delmer, John W. Erickson | 1997-12-09 |
| 5620143 | Constant-flow irrigation tape and method of making | William A. Delmer, Daniel W. C. Delmer, Robert Delmer, John W. Erickson | 1997-04-15 |