Kanagawa, Japan

Tadashi Ikeda

This inventor holds 101 USPTO granted patents and 1 published patent application and 2 EPO patents, primarily in Silver Halide Photography (CPC class 430584). Top assignees: Fuji Photo Film Company, Limited, Hitachi, Ltd., Isuzu Motors Limited. Active years: 1976-2014.

USPTO Granted Patents = 101 

% Patents Active = 97.0

 

Average Co-Inventor Count = 3.3

ph-index = 14

Forward Citations = 723(Granted Patents)

Forward Citations (Not Self Cited) = 697(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Minami-ashigara, JA (1976 - 1978)
  • Ashigara, JP (1981)
  • Kodaira, JP (1981 - 1985)
  • Tsukui, JP (1988 - 1991)
  • Fujisawa, JP (2005)
  • Minami Ashigara, JP (1978 - 2007)
  • Kanagawa, JP (1982 - 2014)

Company Filing History:


Years Active: 1976-2014

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Areas of Expertise:
Transmission
Gear Transmission
Silver Halide Emulsion
Photothermographic Material
Light-Sensitive Material
Methine Compounds
Color Image-Forming Process
Dual Clutch Transmission
Output Shaft Reduction
Photographic Light-Sensitive Material
Photographic Emulsion
Memory Device
101 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Tadashi Ikeda in Transmission Technology

Introduction: Tadashi Ikeda, a prolific inventor based in Kanagawa, Japan, has made significant contributions to the field of transmission technology. With an impressive portfolio of 101 patents, Ikeda has focused particularly on advancements in gear shifting mechanisms, enhancing both functionality and efficiency in automotive systems.

Latest Patents: Tadashi Ikeda's recent innovations include a remarkable speed change device for transmissions and an output shaft reduction-type dual clutch transmission. The speed change device employs a cylindrical drum that moves and rotates, providing a compact size and excellent operability for gear shifting. This invention employs specifically designed drum grooves that work in tandem with fork pins, allowing for precise gear shifts through the rotation of the cylindrical drum and movement along a threaded shaft.

The output shaft reduction-type dual clutch transmission presents a unique solution by utilizing two input shafts connected to clutches and an intermediate shaft to prevent idle rotation at high speeds. This design minimizes excessive stirring of lubricating oil and reduces noise, contributing to smoother operation. The elimination of one gear train within this system shortens the transmission length while maintaining efficiency.

Career Highlights: Tadashi Ikeda's career spans prominent companies such as Fuji Photo Film Company and Hitachi, where he applied his inventive genius to enhance transmission technologies. His work has not only revolutionized the automotive sector but also influenced various allied industries, showcasing his versatility and expertise as an inventor.

Collaborations: Ikeda's innovative journey includes collaborations with esteemed colleagues like Haruo Takei and Ryo Suzuki. These partnerships have fostered a creative environment that nurtures groundbreaking ideas and accelerates the development of advanced technologies in the field.

Conclusion: In summary, Tadashi Ikeda stands as a distinguished figure in the realm of transmission technology, boasting a substantial number of patents that underscore his innovative spirit. His recent inventions, emphasizing efficiency and functionality, continue to set new standards within the industry. With ongoing collaborations, Ikeda is likely to further influence automotive engineering, making invaluable contributions for years to come.

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