Nagano, Japan

Hiroyuki Kamei

This inventor holds 19 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignee: Seiko Epson Corporation. Active years: 2000-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Kamei. Retrieved from https://idiyas.com/inventor/hiroyuki-kamei

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

USPTO Granted Patents = 19 

% Patents Active = 63.2


Average Co-Inventor Count = 2.4

ph-index = 8

Forward Citations = 526(Granted Patents)


Location History:

  • Nagano, JP (2000 - 2004)
  • Nagano-ken, JP (2003 - 2009)
  • Azumino, JP (2010 - 2019)

Company Filing History:


Years Active: 2000-2019

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19 patents (USPTO):Explore Patents

Title: Innovations of Hiroyuki Kamei: A Pioneer in Liquid Ejection Technology

Introduction: Hiroyuki Kamei, based in Nagano-ken, Japan, is an accomplished inventor with a total of 19 patents to his name. His impressive portfolio showcases his dedication to enhancing technology in liquid ejection systems, contributing significantly to the industry. He is currently associated with Seiko Epson Corporation, a leader in printing and imaging technology.

Latest Patents: Among his latest inventions is a notable patent for a liquid ejecting apparatus equipped with a pressure adjusting valve. This innovative apparatus includes a well-designed liquid ejecting section featuring a nozzle for liquid ejection. The system incorporates a supplying path that directs liquid from a liquid accommodating section to the ejecting section. A crucial component is the pressure adjusting valve, featuring a pressure chamber that stores liquid and adjusts the pressure supplied to the ejection section when necessary. Additionally, a discharging path connects to a communicating port within the pressure chamber, complemented by a switching valve.

Career Highlights: Hiroyuki Kamei's career is marked by his extensive contributions to liquid ejection technology. His expertise and groundbreaking inventions have played a vital role in enhancing the performance and efficiency of printing systems, making him a significant figure in the field.

Collaborations: Throughout his career, Kamei has collaborated with talented colleagues, including Masato Shimada and Hong Qiu. These collaborations have further enriched his work and led to revolutionary advancements in the technology behind liquid ejecting apparatuses.

Conclusion: Hiroyuki Kamei's impactful journey as an inventor reflects his commitment to innovation in liquid ejection technology. With his latest patents and ongoing collaborations at Seiko Epson Corporation, he continues to push the boundaries of what is possible, ensuring that his inventions will benefit many industries for years to come.

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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