Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4488250 | Hand-held calculator for performing calculations in feet, inches and fractions | William S. Lipsey | 1984-12-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4488250 | Hand-held calculator for performing calculations in feet, inches and fractions | William S. Lipsey | 1984-12-11 |