Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D309629 | Calculator case | Joseph C. Sereika, Thomas Perelli | 1990-07-31 |
| D308986 | Calculator case | Joseph C. Sereika, Thomas Perelli | 1990-07-03 |
| D257512 | Calculator case | Stuart D. Leer, Myron Beitler | 1980-11-11 |