Kanagawa, Japan

Masao Koyama

This inventor holds 26 USPTO granted patents, primarily in Pharmaceutical Chemistry. Top assignees: Meiji Seika Kaisha, Ltd., Kabushiki Kaisha Toshiba, Sloan-Kettering Institute for Cancer Research. Active years: 1976-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Koyama. Retrieved from https://idiyas.com/inventor/masao-koyama

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


% Patents Active = 96.2

Average Co-Inventor Count = 4.5

ph-index = 11

Forward Citations = 725(Granted Patents)


Location History:

  • Tokyo, JA (1976)
  • Tokyo, JP (1978 - 2001)
  • Yokohama, JP (1983 - 2001)
  • Kanagawa, JP (1990 - 2002)

Company Filing History:


Years Active: 1976-2002

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Areas of Expertise:
Tetrahydrobenzindole
Antitumor Agent
Cyclodepsipeptide
Xanthocillin
Topoisomerase Inhibitors
Fluorophthalimides
Field-Effect Transistor
Polymeric Piezoelectric
Iodoallyl
Electrochemical Sensor
3-Halo-Cephalosporins
Antibiotic Compounds
26 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Masao Koyama

Introduction: Masao Koyama, based in Kanagawa, Japan, has made significant contributions in the field of medicinal chemistry, holding an impressive total of 26 patents. His work focuses on the development of compounds that target serotonin receptors, which play a pivotal role in the treatment and prevention of various mental diseases.

Latest Patents: Among his latest patents is a significant innovation involving tetrahydrobenzindole derivatives. These compounds bind to serotonin receptors and are useful in the treatment or prevention of diseases induced by abnormalities in central and peripheral serotonin control functions. Another notable patent details optically active tetrahydrobenzindole derivatives that possess affinity for a 5-HT receptor, which could be beneficial in preventing and treating mental health disorders. A specific compound from this patent is identified as (S)-2a-4-(4-(2-methoxyphenyl)piperazinyl)butyl)-2a,3,4,5-tetrahydro 1 H-benz[cd]indol-2-one.

Career Highlights: Throughout his career, Masao Koyama has been associated with prominent companies such as Meiji Seika Kaisha, Ltd. and Kabushiki Kaisha Toshiba. His experiences at these organizations have undoubtedly contributed to his expertise and innovative thinking in the field of pharmaceutical sciences.

Collaborations: Koyama has collaborated with esteemed colleagues including Masaji Sezaki and Haruo Yamamoto, further enriching his research and expanding the scope of his innovative contributions in the realm of chemistry and medicine.

Conclusion: Masao Koyama stands out as a key figure in the landscape of medicinal inventions, with a notable focus on serotonin receptor-targeting compounds. His extensive patent portfolio not only showcases his dedication to innovation but also his commitment to addressing critical health issues through scientific advancement.

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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