Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5311137 | Liquid crystal electric field tester for circuit boards | David B. Chang, Slava A. Pollack, James E. Drummond | 1994-05-10 |
| 4792683 | Thermal technique for simultaneous testing of circuit board solder joints | David B. Chang, James E. Drummond, Lee Mickelson | 1988-12-20 |