Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8248263 | Personnel safety utilizing time variable frequencies | Richard Clayton Shervey, John DaSilva, Ahmad Chamseddine | 2012-08-21 |
| 4439799 | Apparatus for reproducing information recorded in a plurality of adjacent tracks | Abraham Hoogendoorn, Uwe Jahnke | 1984-03-27 |