Nagaokakyo, Japan

Tokitsugu Houjo

This inventor holds 1 USPTO granted patent. Top assignee: Mitsubishi Paper Mills Limited. Active years: 1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tokitsugu Houjo. Retrieved from https://idiyas.com/inventor/tokitsugu-houjo

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 = 4.0

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:


Years Active: 1989

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1 patent (USPTO):Explore Patents

Title: Tokitsugu Houjo: Innovator in Photographic Emulsions

Introduction

Tokitsugu Houjo is a notable inventor based in Nagaokakyo, Japan. He has made significant contributions to the field of photographic technology, particularly in the development of silver halide photographic emulsions. His innovative work has led to advancements that enhance the quality and performance of photographic materials.

Latest Patents

Houjo holds a patent for a silver halide photographic emulsion that predominantly contains silver bromide. This emulsion is designed to improve gradation, density, and sensitivity while reducing fog. The patent details a composition that includes specific compounds, which contribute to the enhanced properties of the emulsion.

Career Highlights

Throughout his career, Tokitsugu Houjo has been associated with Mitsubishi Paper Mills Limited, where he has focused on research and development in photographic materials. His work has been instrumental in advancing the technology used in photography, making it more efficient and effective.

Collaborations

Houjo has collaborated with notable colleagues, including Masao Okushima and Katsuaki Iwaosa. These partnerships have fostered innovation and have contributed to the success of their projects in the field of photographic technology.

Conclusion

Tokitsugu Houjo's contributions to the field of photographic emulsions exemplify the impact of innovation in technology. His work continues to influence the industry, showcasing the importance of research and development in enhancing photographic materials.

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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