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For the Inventor, By the Inventor

Nakatsu, Japan

Tsutomu Yamanaka

This inventor holds 13 USPTO granted patents. Top assignee: Yoshitomi Pharmaceutical Industries, Ltd.. Active years: 1977-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Yamanaka. Retrieved from https://idiyas.com/inventor/tsutomu-yamanaka

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 6

Forward Citations = 59(Granted Patents)


Location History:

  • Fukuoka, JA (1977)
  • Oita, JP (1979 - 1987)
  • Nakatsu, JP (1982 - 1994)

Company Filing History:

goldMedal13 out of 198 
 
Yoshitomi Pharmaceutical Industries, Ltd.
 patents

Years Active: 1977-1994

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13 patents (USPTO):Explore Patents
1. 5318969 - Benzopyran compound and its pharmaceutical use (1994-06-07),
2. 5273998 - Process for making an optically active (1993-12-28),
3. 5177216 - Diastereomeric ester compound useful as an intermediate in the making of (1993-01-05),
4. 5162553 - Processes for preparing optically active (1992-11-10),
5. 5143936 - Benzopyran compound and its pharmaceutical use (1992-09-01),
6. 5066816 - Processes for preparing optically active (1991-11-19),
7. 5021432 - Benzopyran compound and its pharmaceutical use (1991-06-04),
8. 4713381 - Oxodiazine compounds and pharmaceutical compositions thereof (1987-12-15),
9. 4709095 - Ortho-aminomethylphenol compounds (1987-11-24),
10. 4365066 - 2(4-n-Hexadecyl amino or oxy phenyl) 5 ethoxy oxazoleacetic acid (1982-12-21),
11. 4175130 - Oxazole- and thiazole-alkanoic acid compounds (1979-11-20),
12. 4053478 - 2,5-Di-substituted 4-oxazolealkanoic acids and esters (1977-10-11),
13. 4012412 - 2,5-Di-substituted 4-oxazolealkanoic acid and esters (1977-03-15),

Title: Tsutomu Yamanaka: Innovator in Pharmaceutical Chemistry

Introduction

Tsutomu Yamanaka is a prominent inventor based in Nakatsu, Japan. He has made significant contributions to the field of pharmaceutical chemistry, holding a total of 13 patents. His work focuses on the development of innovative compounds with potential therapeutic applications.

Latest Patents

Yamanaka's latest patents include a benzopyran compound and its pharmaceutical use. This compound is characterized by a complex general formula that allows for various substitutions, making it versatile for medicinal applications. Another notable patent involves a process for making an optically active 3,4-dihydro-3,4-epoxy-2H-1-benzopyran compound. This method is valuable for producing compounds that exhibit antihypertensive and coronary blood flow-increasing activities.

Career Highlights

Yamanaka is currently associated with Yoshitomi Pharmaceutical Industries, Ltd., where he continues to innovate in the pharmaceutical sector. His research has led to advancements in the development of compounds that can be used in various medical treatments.

Collaborations

Some of his notable coworkers include Osamu Yaoka and Toshio Seki, who have collaborated with him on various projects within the pharmaceutical industry.

Conclusion

Tsutomu Yamanaka's contributions to pharmaceutical chemistry through his patents and research have positioned him as a key figure in the field. His innovative work continues to pave the way for new therapeutic solutions.

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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