Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458436 | Modular drainage tube construction system | Arnold H. Plowman | 1995-10-17 |
| 4995759 | Drainage tube construction | Arnold H. Plowman | 1991-02-26 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458436 | Modular drainage tube construction system | Arnold H. Plowman | 1995-10-17 |
| 4995759 | Drainage tube construction | Arnold H. Plowman | 1991-02-26 |