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For the Inventor, By the Inventor

Ibaraki, Japan

Mitsuru Fujiwara

This inventor holds 10 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1983-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Mitsuru Fujiwara. Retrieved from https://idiyas.com/inventor/mitsuru-fujiwara

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 8

Forward Citations = 105(Granted Patents)


Location History:

  • Dejimamura, JP (1983)
  • Ibaraki, JP (1984 - 1994)

Company Filing History:

goldMedal10 out of 42,726 
 
Hitachi, Ltd.
 patents

Years Active: 1983-1994

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10 patents (USPTO):Explore Patents
1. 5314321 - Screw-type rotary fluid machine including rotors having treated surfaces (1994-05-24),
2. 5223052 - Method of treating surfaces of rotors of the screw type rotary machine (1993-06-29),
3. 5082427 - Screw compressing apparatus, rotor temperature control apparatus for (1992-01-21),
4. 4963079 - Screw fluid machine with high efficiency bore shape (1990-10-16),
5. 4770615 - Screw compressor with scavenging port (1988-09-13),
6. 4560333 - Screw compressor (1985-12-24),
7. 4492546 - Rotor tooth form for a screw rotor machine (1985-01-08),
8. 4475878 - Screw rotor with tooth form produced by thermal deformation and gear (1984-10-09),
9. 4406602 - Screw rotor with specific tooth profile (1983-09-27),
10. 4401420 - Male and female screw rotor assembly with specific tooth flanks (1983-08-30),

Title: Mitsuru Fujiwara: Innovator in Rotary Fluid Machines

Introduction

Mitsuru Fujiwara is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of rotary fluid machines, holding a total of 10 patents. His innovative work focuses on enhancing the efficiency and performance of these machines.

Latest Patents

One of Fujiwara's latest patents is a screw-type rotary fluid machine that includes rotors with treated surfaces. This invention features male and female rotors that rotate within a casing, either with or without mutual contact. Notably, at least one of the rotors is surface-treated to possess a multi-layered structure, which includes a non-electrolytic nickel plating layer and an organic resin covering layer. The use of engineering plastics for the organic resin enhances the mechanical strength of the rotors. Another significant patent involves a method for treating the surfaces of rotors in a screw-type rotary fluid machine. This method includes non-electrolytic nickel plating, heating the rotor, and applying an organic resin layer to improve durability.

Career Highlights

Mitsuru Fujiwara is associated with Hitachi, Ltd., a leading company in technology and innovation. His work at Hitachi has allowed him to develop cutting-edge technologies that advance the capabilities of rotary fluid machines.

Collaborations

Fujiwara has collaborated with notable colleagues, including Katsuhiko Kasuya and Tetsuzo Matsunaga. Their combined expertise has contributed to the successful development of innovative solutions in the field.

Conclusion

Mitsuru Fujiwara's contributions to rotary fluid machines exemplify his dedication to innovation and engineering excellence. His patents and collaborative efforts continue to influence the industry positively.

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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