Katsuta, Japan

Kiyohiko Tanno

This inventor holds 20 USPTO granted patents, primarily in Conductive Materials. Top assignees: Hitachi, Ltd., Hitachi Cable, Inc., Hitachi Koki Co., Ltd.. Active years: 1976-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyohiko Tanno. Retrieved from https://idiyas.com/inventor/kiyohiko-tanno

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 8

Forward Citations = 259(Granted Patents)


Location History:

  • Hitachi, JA (1976)
  • Katsuta, JA (1978)
  • Ibaraki, JP (1982 - 1990)
  • Katsuta, JP (1981 - 1995)

Company Filing History:


Years Active: 1976-1995

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Areas of Expertise:
Conductive Material
Light Emitter Array
Signal Processing
Electrophotographic Recording
Optical Printer Head
Light Emitting Diode
Thermal Recording
Analog to Binary Conversion
Diagnostic Apparatus
Driver Circuit
Facsimile Apparatus
20 patents (USPTO):Explore Patents

Title: Kiyohiko Tanno: Innovator in Conductive Materials and Color Image Encoding

Introduction: Kiyohiko Tanno, a renowned inventor based in Katsuta, Japan, has made significant contributions to the fields of conductive materials and color image encoding. With an impressive portfolio of 20 patents, Tanno has cemented his status as a key player in innovation.

Latest Patents: Tanno's latest inventions include a groundbreaking patent for a conductive material and a process for its preparation. This invention focuses on a conductor made from a reaction-sintered body of a conductive nitride, derived from a metal powder that includes elements such as Titanium (Ti), Zirconium (Zr), and many others. The innovative production process involves heating a molding containing the metal powder in a nitriding gaseous atmosphere devoid of CO gas. Another notable patent involves a method and apparatus for encoding color image information. His approach utilizes a coordinate system in a uniform color space to effectively represent three chrominance signals of a color image, enhancing the efficiency and accuracy of color encoding.

Career Highlights: Throughout his career, Tanno has worked with prestigious organizations, including Hitachi, Ltd. and Hitachi Cable, Inc. His contributions at these companies have been pivotal in developing new technologies and improving existing processes.

Collaborations: Tanno has collaborated with esteemed colleagues in his field, including Hideo Hirane and Masaharu Tadauchi. These partnerships have allowed for the exchange of ideas and expertise, furthering innovation in their respective domains.

Conclusion: Kiyohiko Tanno's work exemplifies the essence of innovation through his patents and collaborative efforts. His contributions to conductive materials and color image technology are invaluable, marking him as an influential figure in the landscape of modern invention.

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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