Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7473360 | Length-adjustable filter cartridge end caps, filter cartridges employing, and methods of making, the same | Charles S. Hoffman, Jr., Charles C. Schuyler | 2009-01-06 |
| 6096207 | Filter cartridge assembly having a reusable support core structure | Charles S. Hoffman, Jr., Robert Sumner | 2000-08-01 |