Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4916278 | Severing metal strip with high frequency electrical current | Wallace C. Rudd | 1990-04-10 |
| 4845326 | Apparatus and method for electrically butt welding of skelp edge faces which have been preheated | Wallace C. Rudd, Robert R. Harriau | 1989-07-04 |
| 4339654 | Methods for the manufacture of heat exchanger panels | Robert R. Harriau | 1982-07-13 |
| 4287947 | Solar panel elements and method of manufacture thereof | Edgar D. Oppenheimer, Wallace C. Rudd | 1981-09-08 |
| 4277871 | Heat exchanger panels and method of manufacture | — | 1981-07-14 |
| 4278868 | Methods and apparatus for heating metal parts with magnetically driven travelling electric arc | Wallace C. Rudd | 1981-07-14 |
| 4241284 | Electrical contact apparatus for high frequency welding | Wallace C. Rudd | 1980-12-23 |
| 4234776 | Method of producing areas of alloy metal on a metal part using electric currents | Wallace C. Rudd | 1980-11-18 |
| 4233484 | High frequency current welding of metal strip to a metal part | — | 1980-11-11 |
| 4219722 | Methods and apparatus for heating metal parts with magnetically driven travelling electric arc | Wallace C. Rudd | 1980-08-26 |
| 4215259 | Surface hardening of metals using electric currents | Wallace C. Rudd | 1980-07-29 |