Shizuoka, Japan

Yoshitaka Yamauchi

This inventor holds 35 USPTO granted patents and 19 published patent applications and 12 EPO patents, primarily in Electrophotographic Toner. Top assignee: Ricoh Company, Ltd.. Active years: 2013-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshitaka Yamauchi. Retrieved from https://idiyas.com/inventor/yoshitaka-yamauchi

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

USPTO Granted Patents = 35 

% Patents Active = 48.6

 

Average Co-Inventor Count = 4.7

ph-index = 5

Forward Citations = 71(Granted Patents)


Company Filing History:


Years Active: 2013-2026

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Areas of Expertise:
Electrophotographic Toner
Image Forming Apparatus
Toner Composition
Developer
Process Cartridge
Toner Manufacturing
Resin Composition
White Toner
Two-Component Developer
Polymer Particle
Image Forming Method
Toner Storage Unit
35 patents (USPTO):Explore Patents

Title: Innovations and Contributions of Yoshitaka Yamauchi in Toner Technology

Introduction: Yoshitaka Yamauchi is a prominent inventor based in Shizuoka, Japan, known for his extensive contributions in the field of toner technologies. With an impressive portfolio of 34 patents, his work primarily focuses on innovations that enhance the performance and efficiency of imaging processes.

Latest Patents: Among his latest patents, Yoshitaka introduced several advancements in toner and imaging apparatuses. One notable invention involves a toner that incorporates a strontium titanate powdery material as an external additive. This innovative toner features Si-containing particles on the surface, with a number average circle equivalent diameter ranging from 5 nm to 15 nm. Additionally, he has developed a toner that includes toner particles with specialized components such as a binder resin and external additive particles. These external additives are characterized by an equivalent circle diameter of 10 nm or greater, and specific volume average particle diameters, contributing to improved toner performance.

Career Highlights: Working at Ricoh Company, Ltd., Yoshitaka Yamauchi has been at the forefront of developing advanced technologies that benefit the imaging industry. His dedication to innovation has led to numerous patents that underline his expertise and commitment to enhancing imaging solutions.

Collaborations: Throughout his career, Yoshitaka has collaborated with notable colleagues, including Kazumi Suzuki and Taichi Nemoto. Together, they have worked on projects that push the boundaries of current toner technologies and improve the overall efficiency of imaging devices.

Conclusion: Yoshitaka Yamauchi's contributions to the field of toner technology exemplify the importance of innovation in advancing imaging solutions. His patented inventions not only reflect his expertise but also mark significant progress in the industry, making him a key figure in the realm of patents and inventions.

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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