Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9027603 | Open ended industrial pipe cap with recessed finger grip | Frederick W. Zeyfang, Brian Mayo | 2015-05-12 |
| 8800603 | Flange protector and masking device | Frederick W. Zeyfang | 2014-08-12 |