Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D297946 | Calculator or similar article | — | 1988-10-04 |
| D294151 | Calculator | — | 1988-02-09 |
| D294152 | Calculator | — | 1988-02-09 |
| 4680455 | Method of manipulating a calculation and device used therewith | — | 1987-07-14 |
| 4596923 | Calculator housing | — | 1986-06-24 |
| 4591703 | Answer bar of a calculator | — | 1986-05-27 |
| 4511765 | Universal control device for restricting dialing and time limiting telephone calls | — | 1985-04-16 |