Alan A. Fennema

Person

Tucson, AZ, US

People

Patents Grantslast 30 patents

Information Patent Grant
System for compensating for hard sector noise degradation of tracki...
- Patent number 6,052,345
- Issue date Apr 18, 2000
- International Business Machines Corporation
- Allen Keith Bates
- G11 - INFORMATION STORAGE
Information Patent Grant
System for compensating for hard sector noise degradation of tracki...
- Patent number 5,936,919
- Issue date Aug 10, 1999
- International Business Machines Corporation
- Allen Keith Bates
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and sytem for cancelling optical servo crosstalk in optical...
- Patent number 5,768,228
- Issue date Jun 16, 1998
- International Business Machines Corporation
- Allen Keith Bates
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk drive with multiple data layer disk and system for foc...
- Patent number 5,499,231
- Issue date Mar 12, 1996
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Masking of tracking error signal abnormalities due to media defects
- Patent number 5,426,625
- Issue date Jun 20, 1995
- International Business Machines Corporation
- Nhan X. Bui
- G11 - INFORMATION STORAGE
Information Patent Grant
Relative position sensing calibration for optical storage device
- Patent number 5,425,013
- Issue date Jun 13, 1995
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus and method for detecting physical orientation of a positi...
- Patent number 5,289,319
- Issue date Feb 22, 1994
- International Business Machines Corporation
- Enrique E. Aviles
- G11 - INFORMATION STORAGE
Information Patent Grant
Single loop servo-positioning systems having means for changing the...
- Patent number 5,257,251
- Issue date Oct 26, 1993
- International Business Machines Corporation
- W. Wai-Chung Chow
- G11 - INFORMATION STORAGE
Information Patent Grant
Acquiring focus in an optical disk system using a time and shape mo...
- Patent number 5,233,585
- Issue date Aug 3, 1993
- International Business Machines Corporation
- James J. Dente
- G11 - INFORMATION STORAGE
Information Patent Grant
Operating optical disk drives including calibrating a tracking erro...
- Patent number 5,220,546
- Issue date Jun 15, 1993
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Acquiring a best focus using a focus signal offset
- Patent number 5,164,932
- Issue date Nov 17, 1992
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Anti-skating control of a positioning servo system
- Patent number 5,142,516
- Issue date Aug 25, 1992
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Reducing amplitude variations of optical disk readback signals and...
- Patent number 5,138,594
- Issue date Aug 11, 1992
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk recorder for diverse media types and having a predeter...
- Patent number 5,136,569
- Issue date Aug 4, 1992
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Calibrating optical disk recorders to some parameters during disk s...
- Patent number 5,134,602
- Issue date Jul 28, 1992
- International Business Machines Corporation
- Francisco A. Baca
- G11 - INFORMATION STORAGE
Information Patent Grant
Acquiring focus in an optical system using a soft focus acquiring s...
- Patent number 5,128,913
- Issue date Jul 7, 1992
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Controlling position of a rotatable transducer in devices employing...
- Patent number 5,097,361
- Issue date Mar 17, 1992
- International Business Machines Corporation
- Edwin R. Childers
- G11 - INFORMATION STORAGE
Information Patent Grant
Positioning systems employing velocity and position control loops w...
- Patent number 5,090,002
- Issue date Feb 18, 1992
- International Business Machines Corporation
- William W. Chow
- G05 - CONTROLLING REGULATING
Information Patent Grant
Controlling head seeking speed in disk storage units by limiting di...
- Patent number 5,060,210
- Issue date Oct 22, 1991
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Servo error controls
- Patent number 5,046,060
- Issue date Sep 3, 1991
- International Business Machines Corporation
- William W. Chow
- G11 - INFORMATION STORAGE
Information Patent Grant
Positioning systems including reliable track crossing detection for...
- Patent number 5,038,333
- Issue date Aug 6, 1991
- International Business Machines Corporation
- William W. Chow
- G11 - INFORMATION STORAGE
Information Patent Grant
Acquiring focus in optical systems using a focus error signal and a...
- Patent number 4,998,233
- Issue date Mar 5, 1991
- International Business Machines Corporation
- Joseph H. DiMatteo
- G11 - INFORMATION STORAGE
Information Patent Grant
Track seeking using a track following loop
- Patent number 4,839,876
- Issue date Jun 13, 1989
- International Business Machines Corporation
- Alan A. Fennema
- G11 - INFORMATION STORAGE
Information Patent Grant
Multiple spindle winding apparatus
- Patent number 4,519,553
- Issue date May 28, 1985
- International Business Machines Corporation
- Jesse L. Campbell
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Alan A. Fennema

Person

Patents Grantslast 30 patents

System for compensating for hard sector noise degradation of tracki...

System for compensating for hard sector noise degradation of tracki...

Method and sytem for cancelling optical servo crosstalk in optical...

Optical disk drive with multiple data layer disk and system for foc...

Masking of tracking error signal abnormalities due to media defects

Relative position sensing calibration for optical storage device

Apparatus and method for detecting physical orientation of a positi...

Single loop servo-positioning systems having means for changing the...

Acquiring focus in an optical disk system using a time and shape mo...

Operating optical disk drives including calibrating a tracking erro...

Acquiring a best focus using a focus signal offset

Anti-skating control of a positioning servo system

Reducing amplitude variations of optical disk readback signals and...

Optical disk recorder for diverse media types and having a predeter...

Calibrating optical disk recorders to some parameters during disk s...

Acquiring focus in an optical system using a soft focus acquiring s...

Controlling position of a rotatable transducer in devices employing...

Positioning systems employing velocity and position control loops w...

Controlling head seeking speed in disk storage units by limiting di...

Servo error controls

Positioning systems including reliable track crossing detection for...

Acquiring focus in optical systems using a focus error signal and a...

Track seeking using a track following loop

Multiple spindle winding apparatus