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For the Inventor, By the Inventor

Saitama, Japan

Masao Kase

This inventor holds 8 USPTO granted patents. Top assignee: Pioneer Electronic Corporation. Active years: 1986-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Kase. Retrieved from https://idiyas.com/inventor/masao-kase

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

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 3.2

ph-index = 7

Forward Citations = 108(Granted Patents)


Location History:

  • Saitama, JP (1986 - 1990)
  • Tokorozawa, JP (1989 - 1993)

Company Filing History:

goldMedal8 out of 2,861 
 
Pioneer Electronic Corporation
 patents

Years Active: 1986-1993

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8 patents (USPTO):Explore Patents
1. 5210725 - Tray loading apparatus for disc players (1993-05-11),
2. 5164934 - Tray loading apparatus for disc players (1992-11-17),
3. 4949328 - Disk player for playing both sides of a disk or multiple disks without (1990-08-14),
4. 4893295 - Front loading disk player (1990-01-09),
5. 4882722 - Front loading disk player (1989-11-21),
6. 4845700 - Front loading disc player (1989-07-04),
7. 4841518 - Clamping mechanism for information recording disk (1989-06-20),
8. 4631716 - Operation changeover mechanism (1986-12-23),

Title: Masao Kase: Innovator in Disc Player Technology

Introduction

Masao Kase is a prominent inventor based in Saitama, Japan. He has made significant contributions to the field of disc player technology, holding a total of 8 patents. His innovative designs have improved the functionality and user experience of disc players.

Latest Patents

One of Kase's latest patents is a tray loading apparatus for disc players. This invention features a control circuit that determines the appropriate motor operation time based on the disc size and tray moving direction. The control circuit produces a pulse-width modulated output to gradually reduce the motor speed, which helps eliminate impact noise when the tray strikes a stopper. The motor deceleration time is measured, and if it does not match a preset target, adjustments are made to ensure smooth tray motion. This innovation effectively absorbs variations in tray moving speed caused by different motor loads, resulting in a seamless user experience.

Career Highlights

Kase has dedicated his career to advancing technology in the audio and visual industry. His work at Pioneer Electronic Corporation has positioned him as a key player in the development of cutting-edge disc player systems. His patents reflect a deep understanding of mechanical engineering and user-centric design.

Collaborations

Throughout his career, Kase has collaborated with talented individuals such as Ryo Matsuura and Masakazu Yamashita. These partnerships have fostered a creative environment that has led to numerous innovations in disc player technology.

Conclusion

Masao Kase's contributions to the field of disc player technology have made a lasting impact. His innovative patents and collaborative efforts continue to shape the future of audio and visual equipment.

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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