Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7341398 | Lift-assisted manhole cover | Jeremy I. Johnson, Lee M. Veldboom, Scott B. Beal, Herbert Carl Barnum, James F. Malpass +4 more | 2008-03-11 |
| 4220927 | Electrical signal converter usable in triangular waveform generation | — | 1980-09-02 |