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Redwood City, CA, United States of America

Ampex Corporation

USPTO Granted Patents = 519

CIPO Patents = 1

Trademarks = 2

Forward Citations = 8,434

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283 inventors (with patents filed for the assignee):

Beverley R Gooch (22 out of 24 patents)

John O Ryan (16 out of 76 patents)

Raymond F Ravizza (13 out of 13 patents)

4. Maurice G Lemoine (12 out of 12 patents)

5. Leonard A Pasdera (12 out of 12 patents)

6. Luigi C Gallo (12 out of 17 patents)

7. Steven D Wagner (11 out of 19 patents)

8. Lionel C Shih (11 out of 16 patents)

9. Dennis M Ryan (10 out of 10 patents)

10. David R Rodal (10 out of 13 patents)

11. David C O'Gwynn (10 out of 10 patents)

12. Kenneth Louth (10 out of 11 patents)

13. Marshall Williams (9 out of 16 patents)

14. Jan S Wesolowski (9 out of 15 patents)

15. Reginald W Oldershaw (9 out of 9 patents)

Core Competencies:

Magnetic Storage

Video Signal Processing

Tape Libraries

Magnetic Head Design

Data Compression

Servo Control

Transducer Technology

Error Correction

Signal Processing

Data Recording

Magnetic Tape

User Configurable Systems

519 patents: Sort by Forward Citations

1. 6724826 - Method and apparatus for improving the image quality of transmitted video signals via pre-filtering (2004-04-20),

2. 6457928 - Inter-row transfer unit for moving tape cartridges between rows of library systems (2002-10-01),

3. 6438623 - Transfer unit extending between two or more cabinets for expansion of tape library systems (2002-08-20),

4. 6124993 - Digital servo track format with leading and trailing identifiers (2000-09-26),

5. 6111718 - Electronic record/play switch with low noise low input impedance (2000-08-29),

6. 6082653 - System for estimating tape pack radius using a Kalman filter (2000-07-04),

7. 6081401 - Step gap head tracking servo (2000-06-27),

8. 6076142 - User configurable raid system with multiple data bus segments and (2000-06-13),

9. 6043947 - Magnetic storage and reproducing system with a low permeability keeper (2000-03-28),

10. 6023396 - Magnetic head tip design to reduce dynamic spacing loss and improve (2000-02-08),

11. 5930398 - Method and apparatus for determining a quantizing factor for (1999-07-27),

12. 5872667 - Mechanical operations and volume format identifying system zones for (1999-02-16),

13. 5870260 - Magnetic recording system having a saturable layer and detection using (1999-02-09),

14. 5861220 - Method and apparatus for providing a magnetic storage and reproducing (1999-01-19),

15. 5843565 - Particulate magnetic medium utilizing keeper technology and methods of (1998-12-01),

Company Overview

Ampex Corporation, headquartered in Redwood City, California, specializes in advanced magnetic storage systems and technologies. The company is renowned for its innovations in magnetic storage, video signal processing, and tape libraries, contributing significantly to data management and archival solutions. Ampex's expertise extends to magnetic head design, data compression, servo control, and transducer technology, ensuring high reliability and performance in data storage and retrieval applications. Their commitment to error correction further enhances data integrity across various platforms.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

519 Patents

#3 in Redwood City, CA

#208 in California

#944 in US

#1,878 in the World

Redwood City, CA, United States of America

Ampex Corporation

Forward Citations = 8,434

283 inventors:

Beverley R Gooch (22 out of 24 patents)

John O Ryan (16 out of 76 patents)

Raymond F Ravizza (13 out of 13 patents)

4. Maurice G Lemoine (12 out of 12 patents)

5. Leonard A Pasdera (12 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ampex Corporation. Retrieved from https://idiyas.com/company/ampex

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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