Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940944 | Cathodic protection analyzer in which the fundamental and odd harmonics of a power line frequency are removed | David Steele, Randolph K. Armstrong | 1990-07-10 |
| D260889 | Touch-pad for a telephone | James D. McLean | 1981-09-22 |