| 2814031 | Magnetic storage keyboard | 1957-11-19 | ||
| 2781503 | Magnetic memory circuits employing biased magnetic binary cores | 1957-02-12 | ||
| 2740110 | Magnetic switching devices | 1956-03-27 | ||
| 2665336 | Electrical keyboard | 1954-01-05 | ||
| 2521723 | Magnetically controlled switch | 1950-09-12 | ||
| 2520935 | Magnetically operated switch | 1950-09-05 |