Tokyo, Japan

Masaharu Itoh

This inventor holds 9 USPTO granted patents and 11 published patent applications and 4 EPO patents. Top assignees: Fujikoki Corporation, Nikon Corporation. Active years: 1999-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaharu Itoh. Retrieved from https://idiyas.com/inventor/masaharu-itoh-2dwyggf3

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

Calculating rank
USPTO Granted Patents = 9 

% Patents Active = 55.6

 

Average Co-Inventor Count = 2.0

ph-index = 5

Forward Citations = 157(Granted Patents)


Company Filing History:


Years Active: 1999-2021

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9 patents (USPTO):Explore Patents

Title: **Masaharu Itoh: Innovator in Variable-Capacity Compressor Technology**

Introduction

Masaharu Itoh, a distinguished inventor based in Tokyo, Japan, has made significant contributions to the field of compressor technology. With a remarkable portfolio that includes nine patents, he has been instrumental in advancing innovations that enhance the performance and efficiency of variable-capacity compressors.

Latest Patents

One of his latest patents is a **Variable-Capacity Compressor Control Valve** that is designed to be compact while effectively suppressing the effects of pressure differences in a compressor's crank chamber and suction chamber. This innovative valve body features an in-valve release passage that allows the pressure in the crank chamber to be released into the suction chamber via a specialized inlet/outlet port. Additionally, the design incorporates a sub valve element that opens or closes the release passage, responding to the movement of a plunger.

Another noteworthy invention is also a **Variable-Capacity Compressor Control Valve**, which guarantees the attraction force of an electromagnetic actuator while improving actuation properties without increasing the overall size of the device. This valve includes a magnetic body, which can be made of either the same or a different magnetic material than that of the plunger, and is strategically fixed to enhance performance.

Career Highlights

Masaharu Itoh has collaborated with leading firms such as Fujikoki Corporation and Nikon Corporation, where he honed his expertise in compressor technology. His work has significantly impacted the efficiency of various mechanical systems in the industry.

Collaborations

Throughout his career, Masaharu Itoh has had the opportunity to work alongside talented individuals, including his coworkers Yoshiyuki Kume and Hisashi Asano. These collaborations have fostered a creative environment, enabling them to tackle complex challenges and push the boundaries of what is possible in compressor technology.

Conclusion

Masaharu Itoh's dedication to innovation in variable-capacity compressor technology places him among the notable inventors in the field. Through his patents and collaborative efforts, he continues to influence the landscape of modern engineering, paving the way for future advancements in compressor systems. His work not only highlights his personal achievements but also underscores the importance of collaboration and ingenuity in driving technological progress.

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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