Donald F. Johann

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Palo Alto, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for setting a threshold level to maintain duty...
- Patent number 5,396,479
- Issue date Mar 7, 1995
- Maxoptix Corporation
- Donald F. Johann
- G11 - INFORMATION STORAGE
Information Patent Grant
Charge pump for restoring DC in an optical recording read channel
- Patent number 5,355,356
- Issue date Oct 11, 1994
- Maxoptix Corporation
- Donald F. Johann
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for calibrating laser write power by averaging...
- Patent number 5,341,360
- Issue date Aug 23, 1994
- Maxoptix Corporation
- Donald F. Johann
- G11 - INFORMATION STORAGE
Information Patent Grant
Compensation for dust on an optical disk by increasing laser writin...
- Patent number 5,184,343
- Issue date Feb 2, 1993
- Donald F. Johann
- G11 - INFORMATION STORAGE
Information Patent Grant
Autonomous fault diagnosis for disk drive using an internal micropr...
- Patent number 4,268,905
- Issue date May 19, 1981
- Sperry Rand Corporation
- Donald F. Johann
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Drive power sequencing
- Patent number 4,233,666
- Issue date Nov 11, 1980
- Sperry Rand Corporation
- Per-Erik Walberg
- G05 - CONTROLLING REGULATING