Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6125925 | Heat exchanger fin with efficient material utilization | Charles B. Obosu, Craig B. Woodard | 2000-10-03 |
| 5660230 | Heat exchanger fin with efficient material utilization | Charles B. Obosu | 1997-08-26 |
| 5404939 | Condensing unit using cross-flow blower | Richard DeVos, Jeffrey B. Scott | 1995-04-11 |
| 4646548 | Tube expanding and grooving tool and method | Robert H. Zimmerli | 1987-03-03 |