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For the Inventor, By the Inventor

Urawa, Japan

Masakazu Sonoda

This inventor holds 6 USPTO granted patents. Top assignees: Sony Corporation, Other. Active years: 1983-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masakazu Sonoda. Retrieved from https://idiyas.com/inventor/masakazu-sonoda

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 3.5

ph-index = 3

Forward Citations = 36(Granted Patents)


Location History:

  • Shinagawa-ku, Tokyo, JP (1983)
  • Tokyo, JP (1983)
  • Urawa, JP (1983 - 1984)
  • Kanagawa, JP (1986)

Company Filing History:

goldMedal5 out of 58,147 
 
Sony Corporation
 patents
silverMedal1 out of 834,570 
Other
 patents

Years Active: 1983-1986

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6 patents (USPTO):Explore Patents
1. 4607297 - Apparatus for detecting clogging of head gap (1986-08-19),
2. 4486692 - DC Motor control circuit for drop-out of stopping pulses in recorder (1984-12-04),
3. 4482850 - Control circuit for DC capstan motor (1984-11-13),
4. 4405955 - Video signal reproducing apparatus (1983-09-20),
5. 4399473 - Apparatus for reproducing video signals in a slow-motion operating mode (1983-08-16),
6. 4396954 - Still mode video signal reproducing apparatus (1983-08-02),

Title: Masakazu Sonoda: Innovator in Video Recording Technology

Introduction

Masakazu Sonoda is a notable inventor based in Urawa, Japan. He has made significant contributions to the field of video recording technology, holding a total of 6 patents. His work has focused on improving the functionality and reliability of recording devices.

Latest Patents

One of Sonoda's latest patents is an apparatus for detecting clogging of the head gap in video recording devices. This invention addresses the issue of recording interruptions caused by clogged head gaps. It operates by switching between outputs of the heads during playback, detecting levels of the head outputs, and activating a clog indicator when necessary. Another significant patent is a DC motor control circuit designed for accurate stopping of tape during intermittent-motion operation. This control circuit enhances the precision of tape movement by utilizing a frequency generator and a position signal generating circuit.

Career Highlights

Throughout his career, Masakazu Sonoda has worked with prominent companies, including Sony Corporation. His experience in the industry has allowed him to develop innovative solutions that enhance video recording technology.

Collaborations

Sonoda has collaborated with notable coworkers such as Hiroyuki Kaimai and Masaaki Komatsu. Their combined expertise has contributed to the advancement of technology in their field.

Conclusion

Masakazu Sonoda's contributions to video recording technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry positively.

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]
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