Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5046892 | Apertured pipe segment | — | 1991-09-10 |
| 4626129 | Sub-soil drainage piping | Keith Brinch | 1986-12-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5046892 | Apertured pipe segment | — | 1991-09-10 |
| 4626129 | Sub-soil drainage piping | Keith Brinch | 1986-12-02 |