Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5832604 | Method of manufacturing segmented stators for helical gear pumps and motors | Howard E. Johnson, Jr. | 1998-11-10 |
| 5238061 | Apparatus for rotating a bit in a well | Howard E. Johnson, Jr., Brian K. Moore | 1993-08-24 |