Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9174299 | Apparatus and method for portable calibration of electrofusion controllers | William E. Groft, Michael W. Groft | 2015-11-03 |
| 6441352 | Apparatus for electrically heat welding thermoplastic fittings and method of using the same | William E. Groft, Michael W. Groft | 2002-08-27 |