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For the Inventor, By the Inventor

Chigasaki, Japan

Kazuo Hirota

This inventor holds 15 USPTO granted patents, primarily in Magnetic Memory Technology. Top assignee: Hitachi, Ltd.. Active years: 1985-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuo Hirota. Retrieved from https://idiyas.com/inventor/kazuo-hirota-m44wtvlx

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

Calculating rank
USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 3.5

ph-index = 8

Forward Citations = 239(Granted Patents)


Location History:

  • Yokohama, JP (1985 - 1987)
  • Chigawaki, JP (1990)
  • Chigasaki, JP (1987 - 1998)

Company Filing History:

goldMedal15 out of 42,743 
 
Hitachi, Ltd.
 patents

Years Active: 1985-1998

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Areas of Expertise:
Inductance Cancelled Condenser
Shielding Method
Mounting Structure
Ceramic Substrate
Magnetic Bubble Memory
Probing Head Manufacturing
Magnetic Field Case
Circuit Board Design
Electronic Circuit Device
Litz Wire
High Frequency Applications
15 patents (USPTO):Explore Patents
1. 5761049 - Inductance cancelled condenser implemented apparatus (1998-06-02),
2. 5491301 - Shielding method and circuit board employing the same (1996-02-13),
3. 5406027 - Mounting structure and electronic device employing the same (1995-04-11),
4. 5249100 - Electronic circuit device provided with a ceramic substrate having lead (1993-09-28),
5. 4975871 - Magnetic bubble memory module with interconnection member (1990-12-04),
6. 4972369 - Magnetic bubble memory module with interconnection member (1990-11-20),
7. 4952272 - Method of manufacturing probing head for testing equipment of (1990-08-28),
8. 4730271 - Magnetic field confirming case with inclined portions for magnetic (1988-03-08),
9. 4725925 - Circuit board (1988-02-16),
10. 4694423 - Magnetic bubble memory module (1987-09-15),
11. 4673772 - Electronic circuit device and method of producing the same (1987-06-16),
12. 4663737 - Magnetic bubble memory unit (1987-05-05),
13. 4592015 - Magnetic bubble memory module (1986-05-27),
14. 4592014 - Magnetic bubble memory device (1986-05-27),
15. 4549042 - Litz wire for degreasing skin effect at high frequency (1985-10-22),

Title: **Innovative Contributions of Kazuo Hirota**

Introduction

Kazuo Hirota, an accomplished inventor based in Chigasaki, Japan, has made significant contributions to the field of electrical engineering. With a portfolio of 15 patents, his work is influential in developing technologies that enhance circuit efficiency and reduce electromagnetic noise.

Latest Patents

Hirota's recent innovations include the "Inductance Cancelled Condenser Implemented Apparatus," which is designed to minimize power source noise by utilizing a unique current path. This apparatus ensures that the effective inductance component of the condenser is reduced by managing the phase of the current passing through it. Another noteworthy patent is the "Shielding Method and Circuit Board Employing the Same," which employs a three-dimensional structure to tackle electromagnetic radiation noise effectively. This circuit board design allows for recycling of materials while maintaining a superior shielding function by enclosing signal lines within conductor layers.

Career Highlights

Kazuo Hirota is currently employed at Hitachi, Ltd., where he continues to push the boundaries of innovation in electronics. His extensive work in electrical engineering has not only earned him patents but has also contributed to advancements in the technology sector.

Collaborations

Throughout his career, Hirota has collaborated with esteemed colleagues such as Yutaka Akiba and Nobuo Kishiro. These partnerships foster a dynamic environment for exchanging innovative ideas and enhancing the quality of their engineering solutions.

Conclusion

Kazuo Hirota exemplifies the spirit of innovation in the technological landscape of Japan. His numerous patents reflect a commitment to solving pressing challenges in the industry, and his contributions will undoubtedly influence the future of electrical engineering.

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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