Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5089062 | Drilling of steel sheet | John Sefko, Richard A. Miller | 1992-02-18 |
| 5067992 | Drilling of steel sheet | John Sefko, Richard A. Miller | 1991-11-26 |
| 4963199 | Drilling of steel sheet | John Sefko, Richard A. Miller | 1990-10-16 |
| 4808464 | Insulating ferromagnetic amorphous metal strips | John Sefko | 1989-02-28 |
| 4759949 | Method of insulating ferromagnetic amorphous metal continuous strip | John Sefko | 1988-07-26 |
| 4447795 | Laminated grid and web magnetic cores | John Sefko | 1984-05-08 |
| 4425166 | Low temperature cure interlaminar coating | John Sefko | 1984-01-10 |
| 4362782 | Low temperature cure interlaminar coating | John Sefko | 1982-12-07 |
| 4265681 | Method of producing low loss pressed magnetic cores from microlaminations | Robert F. Krause, Kurt A. Grunert | 1981-05-05 |