Company Filing History:

7 out of 42,485

Hitachi, Ltd.

patents

4 out of 10

Asahi Chemical Research Laboratory Co., Ltd.

Hitachi Medical Corporation

patents

where one patent can have more than one assignee

Years Active: 1977-1991

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5066692 - Electromagnetic wave shielding composition comprising epoxy resin and (1991-11-19),

2. 4970354 - Electromagnetic wave shielding circuit and production method thereof (1990-11-13),

3. 4837050 - Method for producing electrically conductive circuits on a base board (1989-06-06),

4. 4684054 - Automatic soldering apparatus and method of using the flux to heat the (1987-08-04),

5. 4420444 - Process for forming phosphor powder layer (1983-12-13),

6. 4229312 - Method of manufacturing a paint composite for magnetic films (1980-10-21),

7. 4219587 - Process for producing pigment-coated phosphors (1980-08-26),

8. 4206250 - Process for producing pigment-coated phosphors (1980-06-03),

9. 4086090 - Formation of pattern using acrylamide-diacetoneacrylamide copolymer (1978-04-25),

10. 4040083 - Aluminum oxide layer bonding polymer resin layer to semiconductor device (1977-08-02),

11. 4001870 - Isolating protective film for semiconductor devices and method for (1977-01-04),

Title: Innovations of Yoichi Oba in Electromagnetic Wave Shielding

Introduction

Yoichi Oba is a notable inventor based in Higashiyamato, Japan, recognized for his significant contributions to the field of electromagnetic wave shielding. With a total of 11 patents to his name, he has made remarkable advancements, particularly in the development of materials and circuits designed to combat electromagnetic interference.

Latest Patents

Among his latest patents, Oba has developed an innovative electromagnetic wave shielding composition that incorporates epoxy resin. His patent details an electromagnetic wave shielding circuit, which comprises a base board and an electric circuit formed on it. This circuit features an electrically isolating coating applied over the electric circuit, a layer containing copper particles that is hardened by heating, and a copper plating layer on the surface to discharge electromagnetic wave currents. The unique composition of the coating contains 100% by weight of copper particles mixed with 12%-25% by weight of epoxy resin, effectively enhancing its performance in electromagnetic wave shielding.

Career Highlights

Throughout his career, Yoichi Oba has worked with esteemed companies such as Hitachi, Ltd. and Asahi Chemical Research Laboratory Co., Ltd. These experiences have equipped him with the knowledge and expertise essential for driving innovation in electromagnetic technologies.

Collaborations

In his professional journey, Oba has collaborated with fellow innovators like Yamahiro Iwasa and Isao Morooka. These partnerships have fostered a collaborative environment that has yielded groundbreaking advancements in his field of expertise.

Conclusion

In summary, Yoichi Oba stands out as an inventor dedicated to advancing technology in electromagnetic wave shielding. With a focused approach to innovation, his patents not only showcase his technical skills but also his commitment to addressing modern challenges in electromagnetic interference. His legacy continues to inspire future developments in this critical area of technology.

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