Kanji Kawakami

This inventor holds 30 USPTO granted patents, primarily in Magnetic Recording Technology. Top assignees: Hitachi, Ltd., Hitachi Const. Mach. Company. Active years: 1980-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kanji Kawakami. Retrieved from https://idiyas.com/inventor/kanji-kawakami

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

USPTO Granted Patents = 30

% Patents Active = 100.0

Average Co-Inventor Count = 5.2

ph-index = 17

Forward Citations = 637(Granted Patents)

Location History:

Ibaraki, JP (1980 - 1982)
Katsuta, JP (1980 - 1985)
Hiratsuka, JP (1992 - 1993)
Mito, JP (1985 - 1998)

Company Filing History:

Hitachi Const. Mach. Company

patent

where one patent can have more than one assignee

Years Active: 1980-1998

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Areas of Expertise:

Magnetic Head

Magnetic Recording

Flying Head Slider

Thin-Film Magnetic Head

Optical Information Recording

Pressure Sensor

Semiconductor Pressure Transducer

Magnetoresistive Sensor

Strain Gauge

Electronic Fuel Feed

Capacitive Sensor

Magnetic Rotary Encoder

30 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5719729 - Magnetic head and recording and reproducing apparatus having an (1998-02-17),

2. 5671107 - Large capacity magnetic disc apparatus with a particular relationship (1997-09-23),

3. 5541789 - Magnetic recording apparatus with magnetic head on slider having applied (1996-07-30),

4. 5307214 - Magnetic recording apparatus (1994-04-26),

5. 5251083 - Flying head slider and method of producing the same (1993-10-05),

6. 5245493 - Magnetic information storage apparatus including magnetic head and (1993-09-14),

7. 5128821 - Flying head slider and magnetic disk unit employing same (1992-07-07),

8. 5079662 - Compound magnetic head having a recording head and a reproducing (1992-01-07),

9. 4949209 - Thin-film magnetic head having special input/output terminal backing (1990-08-14),

10. 4861398 - Method for making a thin film magnetic head (1989-08-29),

11. 4773060 - Optical information recording device (1988-09-20),

12. 4689652 - Image sensor (1987-08-25),

13. 4670969 - Method of making silicon diaphragm pressure sensor (1987-06-09),

14. 4665282 - Tablet type coordinate input apparatus using elastic wave (1987-05-12),

15. 4633099 - Feedback circuit for a semiconductor active element sensor (1986-12-30),

Title: The Innovative Contributions of Kanji Kawakami

Introduction

Kanji Kawakami, a notable inventor based in Mito, Japan, has made significant contributions to the field of magnetic technology. With an impressive portfolio of 30 patents, his work primarily revolves around advancements in magnetic head designs and recording apparatuses.

Latest Patents

Kawakami's latest patents reflect his innovative approach to magnetic technology. One of his key inventions is a magnetic head and recording and reproducing apparatus that incorporates an inductive-write, magnetoresistive-read type design. In this apparatus, the magnetic center of the read head is finely aligned with the physical center of the write head by altering the magnetization direction of a magnetoresistive element. This enhancement significantly improves the signal-to-noise (S/N) ratio, even when dealing with narrow track widths. Another patent details a large capacity magnetic disk apparatus capable of achieving a remarkable recording density of 120 megabits per square inch or more. It outlines crucial relationships among the pole thickness of thin-film magnetic heads, saturation flux density of head cores, and recording wavelength targets, ensuring optimal performance with a levitation space of 0.15 micrometers or less between the head and disc.

Career Highlights

Throughout his career, Kanji Kawakami has worked with leading companies such as Hitachi, Ltd. and Hitachi Construction Machinery Company. His experience in these renowned organizations has facilitated numerous advancements in the magnetic technology landscape.

Collaborations

Kawakami has collaborated with esteemed colleagues such as Motohisa Nishihara and Hideo Sato. These collaborations have been instrumental in driving the innovation and refinement of magnetic technology principles, enhancing the effectiveness of their joint inventions.

Conclusion

Kanji Kawakami's contributions to the field of magnetic technology through his numerous patents demonstrate his commitment to innovation. By continually pushing the boundaries of what's possible in recording and reproducing apparatuses, Kawakami has solidified his reputation as a key inventor in his field, influencing the future of data storage technology.

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]