Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6256166 | Tape cassette for cleaning VCR heads and transport components | Robert D. DeMaster, Alexander R. Mitka, John V. Nowicki, Alexander S. Sinclair, Mark W. Weavers | 2001-07-03 |
| 5841613 | Tape cassette for cleaning VCR heads and transport components | Robert D. DeMaster, Alexander R. Mitka, John V. Nowicki, Alexander S. Sinclair, Mark W. Weavers | 1998-11-24 |