Kanagawa, Japan

Tadashi Kasai

This inventor holds 65 USPTO granted patents and 3 published patent applications and 2 EPO patents, primarily in Image Forming Technology (CPC class G03G). Top assignees: Ricoh Company, Ltd., Oki Electric Industry Co., Ltd., Oki Data Corporation. Active years: 1989-2025.

USPTO Granted Patents = 65 

% Patents Active = 55.4

 

Average Co-Inventor Count = 3.4

ph-index = 14

Forward Citations = 696(Granted Patents)

Forward Citations (Not Self Cited) = 655(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Minato, JP (1991)
  • Saitama, JP (2001 - 2003)
  • Saitama-ken, JP (2003)
  • Ota-ku, JP (2006)
  • Yamato, JP (2012)
  • Tokyo, JP (1989 - 2015)
  • Duluth, GA (US) (2018)
  • Kanagawa, JP (2010 - 2019)

Company Filing History:


Years Active: 1989-2025

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Areas of Expertise:
Image Forming Apparatus
Toner Degradation
Print Control Device
Gloss Control
Protective Layer
Varnish Application
Magnetic Brush
Image Glossing
Flexible Tube
Cleaning Method
Developer Reduction
65 patents (USPTO):Explore Patents

Title: Tadashi Kasai: Pioneering Innovations in Image Forming Technology

Introduction: Tadashi Kasai, an esteemed inventor based in Kanagawa, Japan, has made significant contributions to the field of image forming technology. With an impressive portfolio of 64 patents, his innovations have had a lasting impact on the industry.

Latest Patents: Among his recent noteworthy inventions is an advanced image forming apparatus that features a nip forming member and a transfer bias output device. This apparatus is designed to output a transfer bias that establishes a transfer electric field, enhancing the efficiency of composite toner image transfer onto recording media. Kasai's ingenuity is further showcased in his method for calculating a toner degradation rate, which involves a meticulous analysis of toner adhesion amounts across different toner patterns. This innovation allows for a precise comparison and calculation of toner degradation, ensuring optimal performance of the image forming apparatus.

Career Highlights: Throughout his career, Tadashi Kasai has contributed to prestigious companies, including Ricoh Company, Ltd., and Oki Electric Industry Co., Ltd. His work has not only advanced technology but has also helped streamline processes within these leading organizations.

Collaborations: Kasai has collaborated with notable colleagues such as Jiro Tanuma and Masakazu Terao. These partnerships have fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies in image processing.

Conclusion: Tadashi Kasai exemplifies the spirit of innovation in the realm of image forming apparatuses. His extensive patent portfolio and impactful contributions reflect his commitment to advancing technology and improving user experiences. His work continues to influence the industry, making him a prominent figure in the field of image technology.

Profile summary based on public USPTO records.
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