Inventor · disambiguated record
Donald F. Johann
Also filed as: JOHANN DONALD F
6 granted patents·222 citations·filing 1978–1994
87Inventor score
Top patents by PatentIndex Score
6 records- 0193US4268905AAutonomous fault diagnosis for disk drive using an internal microprocessorSPERRY RAND CORP·Filed 1978·Granted May 19, 1981·54 cites·10 claims
- 0287US5341360AMethod and apparatus for calibrating laser write power by averaging upper and lower knees of a calibration profileMAXOPTIX CORP·Filed 1992·Granted Aug 23, 1994·55 cites·21 claims
- 0382US4233666ADrive power sequencingSPERRY RAND CORP·Filed 1978·Granted Nov 11, 1980·33 cites·16 claims
- 0477US5184343ACompensation for dust on an optical disk by increasing laser writing powerJOHANN DONALD F·Filed 1991·Granted Feb 2, 1993·31 cites·17 claims
- 0575US5355356ACharge pump for restoring DC in an optical recording read channelMAXOPTIX CORP·Filed 1993·Granted Oct 11, 1994·28 cites·17 claims
- 0671US5396479AApparatus and method for setting a threshold level to maintain duty cycle in a pulse width modulated optical recording systemMAXOPTIX CORP·Filed 1994·Granted Mar 7, 1995·21 cites·12 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →