Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5469596 | Dual-use and manual pool cleaning apparatus | Herman E. Frentzel | 1995-11-28 |
| 5428854 | Replaceable brush rings for pool cleaners | Herman E. Frentzel | 1995-07-04 |
| 5379473 | Automatic swimming pool cleaner | Herman E. Frentzel | 1995-01-10 |
| 5363877 | Suction regulating valve | Herman E. Frentzel | 1994-11-15 |
| 5293659 | Automatic swimming pool cleaner | Herman E. Frentzel, Jerauld George Wright, Paul Sebor | 1994-03-15 |
| 4920599 | Automatic swimming pool cleaner | — | 1990-05-01 |
| 4683599 | Automatic pool cleaner fitting | — | 1987-08-04 |