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For the Inventor, By the Inventor

Tokyo, Japan

Yasushi Kasahara

This inventor holds 14 USPTO granted patents. Top assignees: Fujirebio Kabushiki Kaisha, Fujizoki Pharmaceutical Co., Ltd.. Active years: 1981-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasushi Kasahara. Retrieved from https://idiyas.com/inventor/yasushi-kasahara

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

USPTO Granted Patents = 14

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 6

Forward Citations = 72(Granted Patents)


Location History:

  • Tama, JP (1981 - 1984)
  • Tokyo, JP (1985 - 1988)

Company Filing History:

goldMedal7 out of 31 
 
Fujirebio Kabushiki Kaisha
 patents
silverMedal7 out of 15 
 
Fujizoki Pharmaceutical Co., Ltd.
 patents

Years Active: 1981-1988

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14 patents (USPTO):Explore Patents
1. 4757001 - Method of measuring biological ligand by utilizing amylase (1988-07-12),
2. 4692404 - Method of measuring biological ligand by the use of enzymes (1987-09-08),
3. 4649105 - Method of measuring biological ligand (1987-03-10),
4. 4634763 - Amylase inhibitor and preparation and use thereof (1987-01-06),
5. 4621048 - Reagents containing an anti-ligand bound to an anti-enzyme and methods (1986-11-04),
6. 4582792 - Immunoassay method using two immobilized biologically active substances (1986-04-15),
7. 4551272 - Derivatives of dipeptide and their use in determining the activity of (1985-11-05),
8. 4544640 - Anti immune complex antibody for determining SLE, rheumatoid arthritis (1985-10-01),
9. 4432896 - Derivatives of hippuryl-L-phenylalanine (1984-02-21),
10. 4419445 - Method for determining the activity of cholinesterases (1983-12-06),
11. 4407944 - Method for determining the activity of the angiotensin-converting enzyme (1983-10-04),
12. 4393134 - Standard blood filter paper for use in diagnosis of histidinemia (1983-07-12),
13. 4367286 - Reference blood filter paper for measuring the concentration of (1983-01-04),
14. 4292404 - Method for determining the activity of the angiotensin-converting enzyme (1981-09-29),

Title: Yasushi Kasahara: Innovator in Biological Measurement Techniques

Introduction

Yasushi Kasahara is a prominent inventor based in Tokyo, Japan, known for his significant contributions to the field of biological measurement techniques. With a total of 14 patents to his name, he has developed innovative methods that enhance the accuracy and sensitivity of clinical tests.

Latest Patents

Among his latest patents, Kasahara has introduced a method of measuring biological ligands by utilizing amylase. This invention focuses on measuring a biological ligand in a sample containing amylase derived from higher animals. The method employs a combination of an additional amylase not present in the sample, along with an antibody against the ligand or a ligand capable of reacting with the antibody. It also incorporates an amylase inhibitor that exhibits stronger inhibitory activity against the sample's amylase. This innovative approach is particularly suitable for clinical tests aimed at determining physiological substances and trace components in humoral fluids such as serum.

Another notable patent is a method of measuring biological ligands using enzymes. This method is designed to be highly sensitive and specific, making it ideal for clinical tests that determine physiological substances and trace components in humoral fluids. It utilizes a conjugate of an enzyme that acts on a water-insoluble macromolecular substance and an antibody against the ligand to be measured. The steric hindrance of the conjugate is emphasized through the enzyme reaction at the boundary between solid and liquid phases.

Career Highlights

Throughout his career, Yasushi Kasahara has worked with notable companies, including Fujizoki Pharmaceutical Co., Ltd. and Fujirebio Kabushiki Kaisha. His work in these organizations has contributed to advancements in the field of biological measurement and clinical testing.

Collaborations

Kasahara has collaborated with esteemed colleagues such as Yoshihiro Ashihara and Masami Sugiyama, further enhancing the impact of his innovations in the scientific community.

Conclusion

Yasushi Kasahara's contributions to the field of biological measurement techniques have established him as a leading inventor in Japan. His innovative methods continue to influence clinical testing and improve the accuracy of physiological substance determination.

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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