Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9920392 | Apparatus for induction hardening | Stephen B. Fitch, Jerry Mills, John Gadus, Stephen P. Johnson | 2018-03-20 |
| 9631252 | Induction hardening system and method | Madhu Sudan Chatterjee | 2017-04-25 |
| 8993942 | Apparatus for induction hardening | Stephen B. Fitch, Jerry Mills, John Gadus, Stephen P. Johnson | 2015-03-31 |
| 8614409 | Induction heating device with electromagnetic diverter | John Gadus | 2013-12-24 |
| 8475610 | Induction hardening system and method | Madhu Sudan Chatterjee | 2013-07-02 |
| 5428208 | Method of induction case hardening a rack bar | Madhu Sudan Chatterjee | 1995-06-27 |
| 5234201 | Contour hardening apparatus | Madhu Sudan Chatterjee | 1993-08-10 |