Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D500084 | Applicator | William D. Hester, Michael Kent | 2004-12-21 |
| 6361234 | Pressurized writing instrument employing a compressible piston member | Albert D'Addario | 2002-03-26 |
| 5924810 | Double seal system for pressurized writing device | Barry W. Chadwick | 1999-07-20 |
| 5906446 | Fillerless writing instrument | Russell McCulloch, Frank Hart, Barry W. Chadwick | 1999-05-25 |
| 5415487 | Vented plug for ink cartridges | Barry W. Chadwick | 1995-05-16 |