Saitama, Japan

Hiroshi Tsukada

This inventor holds 2 USPTO granted patents. Top assignees: Citizen Holdings Company, Ltd., Citizen Electronics Co., Ltd.. Active years: 2011-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Tsukada. Retrieved from https://idiyas.com/inventor/hiroshi-tsukada-axrg4tpv

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


% Patents Active = 50.0

Average Co-Inventor Count = 3.4

ph-index = 1

Forward Citations = 6(Granted Patents)


Location History:

  • Sayama, JP (2011)
  • Saitama, JP (2015)

Company Filing History:


Years Active: 2011-2015

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2 patents (USPTO):Explore Patents

Title: The Innovative Journey of Hiroshi Tsukada: Pioneering LED Technology

Introduction: Hiroshi Tsukada is a notable inventor based in Saitama, Japan, recognized for his contributions to LED technology. With two patents to his name, he has made significant advancements in the field of illumination and liquid crystal device manufacturing, showcasing his expertise and innovative spirit.

Latest Patents: Tsukada's latest patents include an "LED light source device and manufacturing method for the same" and a "large substrate, method of manufacturing liquid crystal device from the same, and liquid crystal device obtained." The LED light source device aims to provide enhanced durability by maintaining high reflectance over extended periods despite light and heat interactions. This device features a specially designed substrate, an electrode, and a unique white inorganic resist layer to improve performance. His second patent focuses on manufacturing methods for liquid crystal devices by cutting panels from a large substrate. This invention effectively utilizes diverse sealing materials to create frames for the panels, optimizing the device's structure and functionality.

Career Highlights: Throughout his career, Hiroshi Tsukada has worked with esteemed companies such as Citizen Holdings Company, Ltd. and Citizen Electronics Co., Ltd. His experience in these organizations has undoubtedly influenced his innovative developments and cemented his reputation as a skilled inventor.

Collaborations: Tsukada has collaborated with talented individuals such as Mizue Fukushima and Kenji Imazu. These partnerships have fostered a creative environment that has allowed for the exploration and execution of groundbreaking ideas in technology.

Conclusion: Hiroshi Tsukada's contributions to the realm of LED technology and liquid crystal devices exemplify the impactful role of inventors in shaping modern advancements. His ongoing dedication to innovation serves as an inspiration for aspiring inventors and highlights the importance of collaboration in achieving remarkable technological progress.

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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