Company Filing History:

12 out of 2,528

Hoya Corporation

patents

2 out of 13

Hoya Magnetics Singapore Pte. Ltd.

where one patent can have more than one assignee

Years Active: 1986-2007

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7169487 - Magnetic recording medium (2007-01-30),

2. 7081308 - Magnetic recording medium (2006-07-25),

3. 6428396 - Method of producing a substrate for an information recording medium and method of producing an information recording medium (2002-08-06),

4. 5954927 - Method of manufacturing magnetic recording medium (1999-09-21),

5. 5900324 - Magnetic recording media, methods for producing the same and magnetic (1999-05-04),

6. 5766727 - Magnetic recording medium and method for manufacturing the same (1998-06-16),

7. 5746893 - Method of manufacturing magnetic recording medium (1998-05-05),

8. 5640089 - Method and apparatus for surface roughness detection - using a (1997-06-17),

9. 5087482 - Method of manufacturing magnetic recording medium capable of recording (1992-02-11),

10. 5029317 - Magnetic recording medium capable of recording information at a high (1991-07-02),

11. 4634639 - Electroluminescent panel having a light absorption layer of germanium (1987-01-06),

12. 4590128 - Thin film EL element (1986-05-20),

13. 4568791 - Solar cell comprising an undulated transparent conductive layer (1986-02-04),

Title: Innovator in Magnetic Technologies: Hisao Kawai

Introduction: Hisao Kawai is a prominent inventor based in Tokyo, Japan, known for his groundbreaking contributions to the field of magnetic recording mediums. With an impressive portfolio of 13 patents, Kawai has demonstrated a remarkable ability to innovate and push the boundaries of technology in magnetic applications.

Latest Patents: Hisao Kawai's latest patents focus on advancements in magnetic recording mediums. One notable invention involves a magnetic recording medium that includes a glass substrate featuring a principal surface with a magnetic layer. This medium boasts a coercive force of 2500 oersted or more in a circumferential direction, enhanced by a textured surface that induces circumferential magnetic anisotropy. Additionally, he has developed another magnetic recording medium comprising a substrate with first and second magnetic layers separated by a spacer layer to induce antiferromagnetic exchange interaction. This innovation ensures uniform thickness and maintains the desired properties essential for recording technologies.

Career Highlights: Throughout his career, Hisao Kawai has made significant contributions to his field while working with prominent companies. He has been affiliated with Hoya Corporation and Hoya Magnetics Singapore Pte. Ltd., where he has applied his expertise to develop cutting-edge magnetic technologies.

Collaborations: Kawai has collaborated with notable colleagues such as Keiji Moroishi and Junichi Horikawa, who have played important roles in advancing his research and innovations in magnetic recording technologies.

Conclusion: Hisao Kawai's work in developing advanced magnetic recording mediums demonstrates his commitment to innovation and excellence in technology. With a continuing focus on improving magnetic properties and functionality, Kawai remains a key figure in the field, inspiring future inventions that could dramatically impact data storage technologies.

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