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For the Inventor, By the Inventor

Tokushima, Japan

Otsuka Pharmaceutical Factory, Inc.


USPTO Granted Patents = 192

% Expired Patents = 14.6



Trademarks = 5

Forward Citations = 3,005

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371 inventors (with patents filed for the assignee):

goldMedal Fujio Inoue (26 out of 26 patents)

silverMedal Isamu Tateishi (20 out of 20 patents)

bronzeMedal Tatsuro Tsuruoka (16 out of 16 patents)

4.  Kinji Hashimoto (14 out of 15 patents)

5.  Yoshihiko Tsuda (13 out of 13 patents)

6.  Yasuhide Inoue (12 out of 12 patents)

7.  Takashi Okamura (11 out of 16 patents)

8.  Kazuyoshi Miyata (11 out of 11 patents)

9.  Akihito Togawa (10 out of 10 patents)

10.  Yasuo Shoji (10 out of 10 patents)

11.  Tamaki Wada (9 out of 9 patents)

12.  Masako Doi (9 out of 9 patents)

13.  Kazuhiko Tsutsumi (9 out of 9 patents)

14.  Masamitsu Izumi (8 out of 8 patents)

15.  Shigetoshi Kashiyama (8 out of 8 patents)


Core Competencies:
Viscoelastic Composition
Infusion Preparation
Stem Cell Suspension
Medical Liquid Applicator
Adhesion Prevention Material
Topical Composition
Cryopreservation Liquid
Sulfated Polysaccharide
Antidepressant
Aseptic Combination Preparation
Transfusion Preparation
Citric Acid Derivative

192 patents:

1. D1130734 - Syringe barrel with a cap (2026-06-16),
2. D1130733 - Nozzle for syringe barrel (2026-06-16),
3. D1130732 - Syringe barrel with cap (2026-06-16),
4. 12629210 - Medical tube position confirmation system (2026-05-19),
5. 12465237 - Medical tube position confirmation system (2025-11-11),
6. 12403224 - Viscoelastic composition (2025-09-02),
7. 12319077 - Printed base material and method for producing the same (2025-06-03),
8. 12264350 - Method for producing sulfated polysaccharide and method for producing PAPS (2025-04-01),
9. 12005070 - Protective agent for keratoconjunctiva or suppressive agent for keratoconjunctival disorder (2024-06-11),
10. 11890372 - Transfusion preparation (2024-02-06),
11. 11889829 - Mammalian cell cryopreservation liquid (2024-02-06),
12. 11872304 - Topical composition (2024-01-16),
13. 11559463 - Method for producing port, and method for producing medical liquid bag (2023-01-24),
14. D975845 - Medicine administration device (2023-01-17),
15. D973199 - Medicine administration device (2022-12-20),
Company Overview
Otsuka Pharmaceutical Factory, Inc., based in Tokushima, Japan, specializes in the development and manufacturing of advanced medical compositions. The company focuses on innovative technologies such as viscoelastic compositions, infusion preparations, and stem cell suspensions. Additionally, Otsuka is engaged in creating medical liquid applicators and materials aimed at preventing adhesion, as well as topical compositions and cryopreservation liquids. Its commitment to research and development positions it as a key player in the medical field, contributing to improved healthcare solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

Otsuka Pharmaceutical Factory, Inc. USPTO Patent Assignee Logo
192 Patents

#1 in Tokushima

#727 in Japan

#4,386 in the World

Tokushima, JP
Tokushima, Japan

Otsuka Pharmaceutical Factory, Inc.

Forward Citations = 3,005

371 inventors:

goldMedal Fujio Inoue (26 out of 26 patents)

silverMedal Isamu Tateishi (20 out of 20 patents)

bronzeMedal Tatsuro Tsuruoka (16 out of 16 patents)

4.  Kinji Hashimoto (14 out of 15 patents)

5.  Yoshihiko Tsuda (13 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Otsuka Pharmaceutical Factory, Inc.. Retrieved from https://idiyas.com/company/otsuka-pharmaceutical-factory

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

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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