Alan A Fennema

This inventor holds 24 USPTO granted patents, primarily in Optical Storage Systems. Top assignee: International Business Machines Corporation. Active years: 1985-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Alan A Fennema. Retrieved from https://idiyas.com/inventor/alan-a-fennema

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 24

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 12

Forward Citations = 389(Granted Patents)

Company Filing History:

24 out of 166,351

International Business Machines Corporation

patents

Years Active: 1985-2000

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Areas of Expertise:

Optical Disk Drive

Tracking Error

Optical Servo

Data Layer Disk

Position Sensing

Focus Signal

Calibration

Servo Control

Media Defects

Transducer Positioning

Track Following

Spindle Winding

24 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6052345 - System for compensating for hard sector noise degradation of tracking (2000-04-18),

2. 5936919 - System for compensating for hard sector noise degradation of tracking (1999-08-10),

3. 5768228 - Method and sytem for cancelling optical servo crosstalk in optical disk (1998-06-16),

4. 5499231 - Optical disk drive with multiple data layer disk and system for focusing (1996-03-12),

5. 5426625 - Masking of tracking error signal abnormalities due to media defects (1995-06-20),

6. 5425013 - Relative position sensing calibration for optical storage device (1995-06-13),

7. 5289319 - Apparatus and method for detecting physical orientation of a position (1994-02-22),

8. 5257251 - Single loop servo-positioning systems having means for changing the (1993-10-26),

9. 5233585 - Acquiring focus in an optical disk system using a time and shape (1993-08-03),

10. 5220546 - Operating optical disk drives including calibrating a tracking error (1993-06-15),

11. 5164932 - Acquiring a best focus using a focus signal offset (1992-11-17),

12. 5142516 - Anti-skating control of a positioning servo system (1992-08-25),

13. 5138594 - Reducing amplitude variations of optical disk readback signals and (1992-08-11),

14. 5136569 - Optical disk recorder for diverse media types and having a predetermined (1992-08-04),

15. 5134602 - Calibrating optical disk recorders to some parameters during disk spin (1992-07-28),

Title: Alan A Fennema - Pioneering Inventor from Tucson, AZ

Introduction: Alan A Fennema is a distinguished inventor based in Tucson, AZ, known for his groundbreaking contributions to various technological fields.

Latest Patents: Alan A Fennema holds several patents in the areas of renewable energy, sustainable agriculture, and advanced materials, showcasing his innovative spirit and commitment to creating a better future.

Career Highlights: With a career spanning over two decades, Alan A Fennema has worked tirelessly to develop cutting-edge solutions that address some of the most pressing challenges faced by society today. His work has been recognized for its ingenuity and practicality.

Collaborations: Throughout his career, Alan A Fennema has collaborated with leading research institutions, universities, and companies to bring his inventions to life. His collaborative approach has led to the successful implementation of several groundbreaking technologies.

Conclusion: Alan A Fennema's passion for innovation and his dedication to creating impactful solutions have solidified his reputation as a visionary inventor in the technological landscape. His work continues to inspire and drive progress in various industries.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]