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For the Inventor, By the Inventor

Furukawa, Japan

Motohiro Shimaoka

This inventor holds 21 USPTO granted patents, primarily in Magnetic Disk Technology. Top assignee: Alps Electric Co., Ltd.. Active years: 1983-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Motohiro Shimaoka. Retrieved from https://idiyas.com/inventor/motohiro-shimaoka

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

USPTO Granted Patents = 21

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 7

Forward Citations = 108(Granted Patents)


Company Filing History:

goldMedal21 out of 4,048 
 
Alps Electric Co., Ltd.
 patents

Years Active: 1983-1988

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Areas of Expertise:
Write Protect Switch
Disk Clamping Mechanism
Disk Ejection Mechanism
Cassette Loading Device
Photosensor Positioning
Magnetic Disk Drive
Cartridge Loading Apparatus
Flexible Magnetic Disc
Recording Device
Drive Apparatus
Sliding Loading
Cartridge Retaining Means
21 patents (USPTO):Explore Patents
1. 4760473 - Write protect switch device (1988-07-26),
2. 4747002 - Disk clamping mechanism (1988-05-24),
3. 4724498 - Disk ejection mechanism for recording-reproducing device (1988-02-09),
4. 4710829 - Disk loading mechanism for recording and reproducing apparatus (1987-12-01),
5. 4704525 - Construction for positioning photosensor devices (1987-11-03),
6. 4685011 - Recording and reproducing apparatus including a cassette loading device (1987-08-04),
7. 4672490 - Recording and reproducing device for magnetic disc including a head (1987-06-09),
8. 4654734 - Magnetic disk drive (1987-03-31),
9. 4647996 - Recording and reproducing apparatus having sliding loading and unloading (1987-03-03),
10. 4646176 - Recording and reproducing apparatus including a cassette loading (1987-02-24),
11. 4613917 - Recording and reproducing device (1986-09-23),
12. 4595963 - Flexible magnetic disc driving apparatus (1986-06-17),
13. 4587585 - Loading/ejecting device for a magnetic disk cartridge (1986-05-06),
14. 4583141 - Flexible magnetic disk driving device (1986-04-15),
15. 4583140 - Disk cartridge loading apparatus for use in recording/reproducing device (1986-04-15),

Title: Motohiro Shimaoka: Innovator in Disk Drive Technology

Introduction

Motohiro Shimaoka, based in Furukawa, Japan, is an accomplished inventor known for his significant contributions to disk drive technology. With a remarkable portfolio of 21 patents, Shimaoka has made notable advancements that enhance the functionality and efficiency of disk drive devices.

Latest Patents

One of his latest innovations is the **write protect switch device**, which is designed to facilitate the safe insertion and ejection of disk cartridges. This device incorporates an arm supported by a frame that allows a rotatable cam member to operate effectively. As a disk cartridge is inserted, the cam member displaces the arm, activating the write protect mechanism by fitting into a notch on the cartridge's casing. Similarly, it maintains the arm's position during ejection, ensuring a seamless user experience.

Another significant invention is the **disk clamping mechanism**, which plays a crucial role in writing and reading information on disks. This innovation features a rotary system that includes a hub for centering the disk and pressing it against the spindle hub. The design incorporates advanced mechanisms to correct any tilting of the disk, ensuring optimal interaction with the disk driving device.

Career Highlights

Motohiro Shimaoka has dedicated his career to the advancement of disk drive technology while working at Alps Electric Co., Ltd. His expertise and innovations have been instrumental in shaping modern disk drive systems, contributing to higher standards of data storage and retrieval.

Collaborations

Shimaoka has collaborated with talented colleagues, including Yukio Saito and Makito Takikawa. Together, they have worked on various projects that push the envelope in disk drive technology, fostering an atmosphere of innovation and creativity within their team.

Conclusion

Motohiro Shimaoka stands as a prominent figure in the field of disk drive technology. His patents and inventions not only reflect his ingenuity but also contribute significantly to the ongoing evolution of data storage solutions. As technology continues to progress, inventors like Shimaoka are essential in driving innovation forward, ensuring that the technological landscape remains dynamic and effective.

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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