Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4951855 | Counter stress beam hangers | Jeff A. Jacobson | 1990-08-28 |
| 4286640 | Tamperproof port cover | Kenneth H. Knox, Mark E. Larkin | 1981-09-01 |
JD
James R. Duffield
Unknown: 1 patents #29,356 of 83,584Top 40%
Overall (All Time): #2,325,770 of 4,157,543Top 60%
2
Patents All Time