DS

David Shapiro

II It'S Academic Of Illinois: 17 patents #1 of 4Top 25%
VT Visic Technologies: 5 patents #2 of 11Top 20%
HP HP: 4 patents #1,237 of 7,018Top 20%
📍 Rishon LeZion, MA: #1 of 3 inventorsTop 35%
Overall (All Time): #129,790 of 4,157,543Top 4%
29
Patents All Time

Issued Patents All Time

Showing 26–29 of 29 patents

Patent #TitleCo-InventorsDate
4611307 Function analyzing Roy W. Reach, William M. Kahn 1986-09-09
4381554 Calculator for storing source data and evaluating numerical answers to problems Roy W. Reach, William M. Kahn 1983-04-26
4309761 Calculator for evaluating numerical answers to problems Roy W. Reach, William M. Kahn 1982-01-05
4198684 Electronic calculator with keyboard-controlled unary function capability Roy W. Reach, William M. Kahn 1980-04-15