Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6158515 | Artificial lifting device for well fluids using a continous loop | Herbert W. Markwardt, Stephen B. Markwardt, Walter R. Shaw, John R. Watson | 2000-12-12 |
| 4456832 | Circuit breaker control device | James B. Newport | 1984-06-26 |
| 4449055 | Circuit breaker control device | James B. Newport | 1984-05-15 |