Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5279222 | Method for preventing counterfeiting of sales and other records | — | 1994-01-18 |
| 5251989 | Apparatus for making a multi-colored printing ribbon | — | 1993-10-12 |
| 4610555 | Universal ribbon spool for typewriters and other machines | — | 1986-09-09 |
| 4482262 | Transfer/correcting ribbon | — | 1984-11-13 |