Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352475 | Audio frequency track circuit for rapid transit applications with signal modulation security | James R. Hoelscher | 1982-10-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4352475 | Audio frequency track circuit for rapid transit applications with signal modulation security | James R. Hoelscher | 1982-10-05 |