DJ

Donald F. Johann

MA Maxoptix: 3 patents #3 of 17Top 20%
SR Sperry Rand: 2 patents #5 of 84Top 6%
📍 Palo Alto, CA: #3,310 of 9,675 inventorsTop 35%
🗺 California: #93,399 of 386,348 inventorsTop 25%
Overall (All Time): #890,141 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5396479 Apparatus and method for setting a threshold level to maintain duty cycle in a pulse width modulated optical recording system 1995-03-07
5355356 Charge pump for restoring DC in an optical recording read channel John E. DeFiore 1994-10-11
5341360 Method and apparatus for calibrating laser write power by averaging upper and lower knees of a calibration profile Alan C. Burroughs, Neil Phipps, Feng Li 1994-08-23
5184343 Compensation for dust on an optical disk by increasing laser writing power Alan C. Burroughs 1993-02-02
4268905 Autonomous fault diagnosis for disk drive using an internal microprocessor Charles E. Mendenhall 1981-05-19
4233666 Drive power sequencing Per-Erik Walberg, Charles E. Mendenhall 1980-11-11