Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845326 | Apparatus and method for electrically butt welding of skelp edge faces which have been preheated | Wallace C. Rudd, Humfrey N. Udall | 1989-07-04 |
| 4339654 | Methods for the manufacture of heat exchanger panels | Humfrey N. Udall | 1982-07-13 |
| 4256252 | Soldering apparatus | Robert D. Huppunen | 1981-03-17 |