Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5176219 | Method of sealing holes in the ground | Jack H. Cole, Mark P. DiStefano | 1993-01-05 |
| 5172450 | Shaft cleaning and decontamination apparatus | Jack H. Cole, Mark P. DiStefano | 1992-12-22 |