Toshiro Yamada

This inventor holds 7 USPTO granted patents. Top assignees: Sony Corporation, Ricoh Company, Ltd.. Active years: 1980-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiro Yamada. Retrieved from https://idiyas.com/inventor/toshiro-yamada-1nl72yao

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

Calculating rank

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 4

Forward Citations = 88(Granted Patents)

Location History:

Kamakura, JP (1980 - 1987)
Kawagawa, JP (1987)
Kanagawa, JP (1986 - 1989)

Company Filing History:

Years Active: 1980-1989

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. D300149 - Whiteboard and photocopier (1989-03-07),

2. 4746884 - YIG thin film microwave apparatus (1988-05-24),

3. 4745380 - YIG thin film microwave apparatus (1988-05-17),

4. 4704739 - Receiving circuit for converting signals comprising at least two (1987-11-03),

5. 4642795 - Thermomagnetic recording system (1987-02-10),

6. 4626800 - YIG thin film tuned MIC oscillator (1986-12-02),

7. 4228473 - Pick-up device for magnetically recorded information and method and (1980-10-14),

Title: Toshiro Yamada: Innovator in Thin Film Technology

Introduction

Toshiro Yamada is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of technology, particularly in the development of innovative devices. With a total of 7 patents to his name, Yamada has established himself as a key figure in the industry.

Latest Patents

Among his latest inventions is a YIG thin film microwave apparatus. This device utilizes the ferrimagnetic resonance effect and features a magnetic circuit with a gap of length lg. The YIG thin film device is designed to apply a bias magnetic field perpendicular to its film surface. The magnetic circuit includes a permanent magnet and a soft magnetic plate, each with specific thicknesses. This invention aims to enhance the performance of microwave devices.

Career Highlights

Yamada has worked with notable companies such as Sony Corporation and Ricoh Company, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various technological advancements. His work has had a lasting impact on the industry.

Collaborations

Throughout his career, Yamada has collaborated with talented individuals, including Yoshikazu Murakami and Seigo Ito. These partnerships have fostered innovation and led to the development of groundbreaking technologies.

Conclusion

Toshiro Yamada's contributions to the field of technology, particularly through his patents and collaborations, highlight his role as an influential inventor. His work continues to inspire future innovations in the industry.

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]