3226506 | Magnetic device for circuit control | 1965-12-28 | ||
3201537 | High speed magnetic electric switch | 1965-08-17 | ||
3164825 | Signal converter systems | 1965-01-05 | ||
3160875 | Magnetic encoder | 1964-12-08 | ||
3146381 | Magnetic force control or switching system | 1964-08-25 | ||
3129419 | Electromagnetic code conversion arrangements | 1964-04-14 |