Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4672845 | Polish rod temperature sensing system and rod stroking control | Michael J. Hirsch, William Dunn | 1987-06-16 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4672845 | Polish rod temperature sensing system and rod stroking control | Michael J. Hirsch, William Dunn | 1987-06-16 |