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For the Inventor, By the Inventor

Pleasanton, CA, United States of America

Castlewood Systems, Inc.


USPTO Granted Patents = 22

Forward Citations = 130

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11 inventors (with patents filed for the assignee):

goldMedal Syed H Iftikar (9 out of 9 patents)

silverMedal Albert J Guerini (8 out of 27 patents)

bronzeMedal Long Van Nguyen (7 out of 43 patents)

4.  Hong Khuu (7 out of 10 patents)

5.  David M Drouin (5 out of 12 patents)

6.  Frank Ivan Morris (4 out of 22 patents)

7.  Vien N Nguyen (3 out of 4 patents)

8.  Stephen R Jackson (2 out of 3 patents)

9.  Howard Steinhoff (1 out of 1 patent)

10.  Venkat R Koka (1 out of 1 patent)

11.  Li-Hsin Lu (1 out of 1 patent)


22 patents:

1. 6369970 - Multiple disk write method and device (2002-04-09),
2. 6353510 - Disk speed profile method and device (2002-03-05),
3. 6271986 - Video disk cartridge disk hub locking mechanism (2001-08-07),
4. 6226142 - Burst pattern for detecting the position of a read/write head relative to a magnetic disk (2001-05-01),
5. 6191904 - Data sector timing compensation technique based upon drive eccentricity (2001-02-20),
6. 6188545 - Moveable disk wiper apparatus and method (2001-02-13),
7. 6125006 - Voice coil motor actuated video data cartridge release (2000-09-26),
8. 6092195 - Encryption of defects map (2000-07-18),
9. 6081407 - Cover springs for positioning a removable video disk cartridge (2000-06-27),
10. 6081400 - Power-off method and device for electronic storage apparatus (2000-06-27),
11. D424048 - Video and computer data cartridge (2000-05-02),
12. 6028737 - Removable drive cover having flush surface (2000-02-22),
13. 6028736 - Location and centering of a digital video cartridge within a disk drive (2000-02-22),
14. D418828 - Element of an audio, video and computer data cartridge (2000-01-11),
15. 6011773 - Anti-rattle mechanism for a removable video disk cartridge (2000-01-04),
Company Overview
Castlewood Systems, Inc. is a technology company based in Pleasanton, California, specializing in advanced data storage solutions. The organization focuses on developing innovative storage technologies that cater to the needs of various industries, emphasizing reliability and performance. With a commitment to enhancing data management, Castlewood integrates cutting-edge research in storage systems, ensuring that its products meet the evolving demands of businesses and consumers alike.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

22 Patents

#31 in Pleasanton, CA

#3,582 in California

#15,021 in US

#28,749 in the World

Pleasanton, CA (US)
Pleasanton, CA, United States of America

Castlewood Systems, Inc.

Forward Citations = 130

11 inventors:

goldMedal Syed H Iftikar (9 out of 9 patents)

silverMedal Albert J Guerini (8 out of 27 patents)

bronzeMedal Long Van Nguyen (7 out of 43 patents)

4.  Hong Khuu (7 out of 10 patents)

5.  David M Drouin (5 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Castlewood Systems, Inc.. Retrieved from https://idiyas.com/company/castlewood-systems

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

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]
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