Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880066 | Assembly for directional drilling of boreholes | Robert Nicholas Worrall | 1989-11-14 |
AS
Abe Steiginga
Overall (All Time): #3,941,616 of 4,157,543Top 95%
1
Patents All Time