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For the Inventor, By the Inventor

Odawara, Japan

Kenzo Masuda

This inventor holds 15 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1977-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenzo Masuda. Retrieved from https://idiyas.com/inventor/kenzo-masuda

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

USPTO Granted Patents = 15

% Patents Active = 93.3

Average Co-Inventor Count = 1.8

ph-index = 8

Forward Citations = 129(Granted Patents)


Location History:

  • Tokorozawa, JA (1977 - 1978)
  • Tokorozawa, JP (1978 - 1980)
  • Odawara, JP (1992 - 2003)

Company Filing History:

goldMedal15 out of 42,740 
 
Hitachi, Ltd.
 patents

Years Active: 1977-2003

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15 patents (USPTO):Explore Patents
1. 6661606 - Magnetic disk apparatus with magnetic head having upper and lower magnetic cores of an electroplated thin film (2003-12-09),
2. 6490131 - Thin film magnetic head with electroplated Ni-Fe alloy thin film having small average crystal grain size range (2002-12-03),
3. 6385009 - Thin film magnetic head and assembled construction thereof (2002-05-07),
4. 6262867 - Thin film magnetic head with Ni-Fe alloy thin film (2001-07-17),
5. 6118628 - Thin film magnetic head with Ni-Fe alloy thin film (2000-09-12),
6. 5162163 - Magnetic recording medium having a lubricant film consisting of a (1992-11-10),
7. 5079062 - Magnetic recording medium having a thin film magnetic layer formed over (1992-01-07),
8. 4239980 - Integrated circuit having an operation voltage supplying depletion type (1980-12-16),
9. 4107548 - Ratioless type MIS logic circuit (1978-08-15),
10. 4074238 - Semiconductor read-only memory (1978-02-14),
11. 4069430 - MIS switching circuit capable of enduring high voltage (1978-01-17),
12. 4069427 - MIS logic circuit of ratioless type (1978-01-17),
13. 4053791 - Logic circuit of ratioless structure (1977-10-11),
14. 4045686 - Voltage comparator circuit (1977-08-30),
15. 4015216 - Frequency-voltage converter and a stabilized pulse generator using it (1977-03-29),

Title: Kenzo Masuda - Innovator in Magnetic Disk Technology

Introduction

Kenzo Masuda, based in Odawara, Japan, is a prominent inventor recognized for his contributions to the field of magnetic disk technology. With a remarkable portfolio of 15 patents, he has significantly advanced the capabilities of magnetic recording systems.

Latest Patents

Among his latest innovations, Masuda has developed a magnetic disk apparatus that features a magnetic head incorporating upper and lower magnetic cores made from an electroplated thin film. This apparatus includes a magnetic disk designed for recording information along with a sophisticated magnetic head, which consists of both reproducing and recording heads. The reproducing head comprises a lower shield film, a magnetoresistive film, a pair of electrodes, and an upper shield. The recording head is engineered with an upper magnetic core, a lower magnetic core, and a coil positioned between them. Notably, both magnetic cores are crafted from an electroplated thin film with an average crystal grain size of less than 500 angstroms, composed of a Ni-Fe alloy with specific weight percentages of nickel and iron.

Additionally, Masuda has designed a thin film magnetic head that includes similar features, showcasing the innovative use of the electroplated Ni-Fe alloy thin film to achieve optimal magnetic performance with a small average crystal grain size.

Career Highlights

Kenzo Masuda has made significant strides while working with Hitachi, Ltd., where he has played a key role in the development of cutting-edge magnetic technologies. His expertise has led to the creation of advanced products that have made a lasting impact in the industry.

Collaborations

Throughout his career, Masuda has collaborated with esteemed coworkers such as Masaaki Sano and Yoshiaki Kita. Their joint efforts have contributed to pushing the boundaries of magnetic disk technology, fostering an environment of innovation and expertise within their team at Hitachi.

Conclusion

Kenzo Masuda stands out as a leading inventor in the realm of magnetic disk technology. His innovative patents and collaborative efforts with talented colleagues have made significant contributions to the advancements of recording systems. As technology continues to evolve, Masuda’s work will likely remain influential in shaping the future of magnetic data storage solutions.

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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