| D335704 |
Partially shell encased swimming pool chemical tablet |
— |
1993-05-18 |
| 5137731 |
Chemical tablet with central hole and partially exposed top and bottom |
— |
1992-08-11 |
| D328333 |
Container for swimming pool chemical tablets for use in skimmers, floaters or feeders |
— |
1992-07-28 |
| D325619 |
Shell encased pool chemical tablet |
— |
1992-04-21 |
| D309493 |
Chlorine dispenser for swimming pools |
— |
1990-07-24 |
| 4928813 |
Encased pool chemical capsule with extended ends and method of making the same |
— |
1990-05-29 |
| 4923618 |
Method of chlorinating a swimming pool |
David E. Michaels |
1990-05-08 |
| 4876003 |
Encased pool chemical tablet with domed ends |
— |
1989-10-24 |
| D283649 |
Swimming pool chemical tablet |
— |
1986-04-29 |
| 4546503 |
Pool chemical tablet and container |
— |
1985-10-15 |
| 4444316 |
Gas scavenger agents for containers of solid chloroisocyanurates |
— |
1984-04-24 |
| 4349493 |
Briquets of hydrated calcium hypochlorite |
Clair H. Putnam |
1982-09-14 |
| 4208376 |
Water treatment chemical dispenser with control tube |
Arlon G. Sangster, Joseph J. Tepas, Jr. |
1980-06-17 |