Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858305 | Single station tension hairpin tube expander | Kenneth P. Gray, Michael L. McDonough, Daniel P. Gaffaney, Ross A. Moyer | 1989-08-22 |
| 4850101 | Dual-station flexible hairpin tube expansion apparatus | Michael L. McDonough | 1989-07-25 |