Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6229988 | Method of and apparatus for battery and similar power source conservation in periodically operable portable and related radio receivers and the like | Norval Stapefeld, Sheldon Apsell | 2001-05-08 | $1,045,000 |