Patents per Year
Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6337645 | Filter for digital-to-analog converters | — | 2002-01-08 | $491,020,000 |
| 5872531 | Signal encode/decode system | Keith O. Johnson | 1999-02-16 | |
| 5864311 | Systems for enhancing frequency bandwidth | Keith O. Johnson | 1999-01-26 | |
| 5854600 | Hidden side code channels | Keith O. Johnson | 1998-12-29 | |
| 5838274 | Systems for achieving enhanced amplitude resolution | Keith O. Johnson | 1998-11-17 | |
| 5808574 | Systems for achieving enhanced frequency resolution | Keith O. Johnson | 1998-09-15 | |
| 5640161 | Silent data conversion system with sampling during electrical silence | Keith O. Johnson | 1997-06-17 | |
| 5479168 | Compatible signal encode/decode system | Keith O. Johnson | 1995-12-26 | |
| 4884266 | Variable speed local area network | — | 1989-11-28 | $6,879,000 |