Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5454402 | Hydraulically efficient ribbed pipe having openings | James R. Andre | 1995-10-03 |
| 4964440 | Ribbed pipe | James R. Andre | 1990-10-23 |
| 4838317 | Hydraulically efficient ribbed pipe | James R. Andre | 1989-06-13 |
| 4290160 | Rotary brush | — | 1981-09-22 |