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For the Inventor, By the Inventor

Redwood City, CA, United States of America

Ampex Corporation


USPTO Granted Patents = 519


Trademarks = 2

Forward Citations = 8,410

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283 inventors (with patents filed for the assignee):

goldMedal Beverley R Gooch (22 out of 24 patents)

silverMedal John O Ryan (16 out of 76 patents)

bronzeMedal 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:
Image Quality Improvement
Tape Library Systems
Digital Servo Track Format
Kalman Filter
Magnetic Storage Systems
Video Special Effects
Data Recording Systems
Magnetic Head Design
Servocontrol Systems
Error Correction Techniques
Data Compression Methods
User Configurable RAID

519 patents:

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),
Ampex Corporation is a pioneering American electronics company that specializes in the design and manufacture of audio and video recording and data storage products. With a rich history dating back to 1944, Ampex has been at the forefront of developing influential technologies such as magnetic tape recording and digital storage solutions. Today, Ampex continues to deliver advanced solutions for the professional and military markets, serving clients globally with their innovative products and cutting-edge technology.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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519 Patents

#2 in Redwood City, CA

#210 in California

#909 in US

#1,819 in the World

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Redwood City, CA, United States of America

Ampex Corporation

Forward Citations = 8,410

283 inventors:

goldMedal Beverley R Gooch (22 out of 24 patents)

silverMedal John O Ryan (16 out of 76 patents)

bronzeMedal 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)

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