Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6484974 | Controller for switch machine | Raymond C. Franke, Leonard Wydotis | 2002-11-26 |
| 6366041 | Railway switch machine motor control apparatus | Raymond C. Franke | 2002-04-02 |
| 6300734 | Motor control apparatus for a railway switch machine | Raymond C. Franke, Leonard Wydotis | 2001-10-09 |
| 5507456 | Reduced harmonic switching mode apparatus and method for railroad vehicle signaling | James P. Brown | 1996-04-16 |
| 5485977 | Reduced harmonic switching mode apparatus and method for railroad vehicle signaling | James P. Brown | 1996-01-23 |
| 4560953 | Fail-safe square-wave oscillator | — | 1985-12-24 |