Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4902320 | Bottled water cooler air filter | William L. Schroer | 1990-02-20 |
| 4834267 | Bottled water cooler air filter | William L. Schroer | 1989-05-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4902320 | Bottled water cooler air filter | William L. Schroer | 1990-02-20 |
| 4834267 | Bottled water cooler air filter | William L. Schroer | 1989-05-30 |