Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4897518 | Method of monitoring induction heating cycle | Jonathan W. Alexander, George D. Pfaffmann, Richard H. McKelvey | 1990-01-30 |
| 4894501 | Method and apparatus for induction heating of gear teeth | George D. Pfaffmann, Norbert R. Balzer, Donald E. Novorsky | 1990-01-16 |
| 4855551 | Method and apparatus for hardening gears | George D. Pfaffmann, Donald E. Novorsky | 1989-08-08 |
| 4855556 | Method and apparatus for hardening gears and similar workpieces | Donald E. Novorsky, George D. Pfaffmann | 1989-08-08 |
| 4816633 | Method of monitoring induction heating cycle | Jonathan W. Alexander, George D. Pfaffmann, Richard H. McKelvey | 1989-03-28 |
| 4785147 | System for hardening gears by induction heating | George D. Pfaffmann, Donald E. Novorsky | 1988-11-15 |
| 4757170 | Method and apparatus for induction heating gears and similar workpieces | Donald E. Novorsky, George D. Pfaffmann | 1988-07-12 |
| 4749834 | Method and apparatus of hardening gears by induction heating | George D. Pfaffmann, Donald E. Novorsky | 1988-06-07 |
| 4728761 | Method and apparatus for hardening axially spaced cams on a camshaft | John R. Laughlin, William Z. Nelson, Robert C. Johnson | 1988-03-01 |
| 4675488 | Method for hardening gears by induction heating | Donald E. Novorsky, George D. Pfaffmann | 1987-06-23 |
| 4625090 | Apparatus for inductively heat treating workpiece bore walls | George D. Pfaffmann | 1986-11-25 |
| 4604510 | Method and apparatus for heat treating camshafts | John R. Laughlin | 1986-08-05 |
| 4531987 | Method for inductively heat treating workpiece bore walls | George D. Pfaffmann | 1985-07-30 |