Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304505 | Underwater pool cleaning apparatus | Robert W. Maier, Charles J. Patterson, Deiter Rief, John Leavitt Gard | 1989-11-07 |
| 4823837 | Skimmer cover plate | — | 1989-04-25 |
| 4817991 | Safety fitting for a vacuum orifice in a swimming pool | Deiter Rief | 1989-04-04 |