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For the Inventor, By the Inventor

Kagawa, Japan

Medrx Co., Ltd


USPTO Granted Patents = 40

% Expired Patents = 32.5


Trademarks = 1

Forward Citations = 105

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35 inventors (with patents filed for the assignee):

goldMedal Hidetoshi Hamamoto (34 out of 37 patents)

silverMedal Katsunori Kobayashi (9 out of 9 patents)

bronzeMedal Masaki Ishibashi (8 out of 8 patents)

4.  Yasushi Miwa (7 out of 7 patents)

5.  Takahiro Tanimoto (7 out of 7 patents)

6.  Keiko Yamasaki (7 out of 10 patents)

7.  Katsuhiro Yamanaka (6 out of 6 patents)

8.  Naoya Akazawa (4 out of 4 patents)

9.  Noboru Tatsumi (4 out of 4 patents)

10.  Kiyotsuna Toyohara (3 out of 3 patents)

11.  Sueko Matsumura (3 out of 3 patents)

12.  Takashi Oda (2 out of 60 patents)

13.  Taishi Tanaka (2 out of 3 patents)

14.  Koichi Masaoka (2 out of 2 patents)

15.  Hideakira Yokoyama (2 out of 4 patents)


Core Competencies:
Microneedle Patch
Transdermal Composition
Percutaneous Absorption
Adhesive Patch
Drug Delivery System
Pharmaceutical Composition
Patch Preparation
Liquid Formulation
Accidental Use Prevention
Therapeutic Application
External Preparation
Medication Delivery

40 patents:

1. 12442001 - Double stranded RNA specifically inhibiting expression of IL-23 and pharmaceutical composition comprising same (2025-10-14),
2. 12016924 - Composition for patch preparation comprising drug, organic solvent, lipophilic mass base, and powder (2024-06-25),
3. 11903939 - Patch preparations with accidental use prevention features (2024-02-20),
4. 11701507 - Microneedle patch applicator and housing for same (2023-07-18),
5. 11660344 - Transdermal colloidal solution agent (2023-05-30),
6. 11559519 - Tizanidine therapy system (2023-01-24),
7. 11510882 - Non-readherable adhesive patch (2022-11-29),
8. 11382978 - Percutaneous absorption composition (2022-07-12),
9. 11351348 - Microneedle patch (2022-06-07),
10. 11167119 - Microneedle patch applicator and housing for same (2021-11-09),
11. 11141387 - Memantine-containing transdermally absorbable liquid (2021-10-12),
12. 11116953 - Microneedle applicator and microneedle patch application device (2021-09-14),
13. 11090265 - Aqueous preparation for external use (2021-08-17),
14. D926966 - Package for containing a micro needle patch (2021-08-03),
15. 10932955 - Percutaneous absorption agent delivery device and manufacturing method therefor (2021-03-02),
Company Overview
Medrx Co., Ltd, based in Kagawa, Japan, specializes in advanced drug delivery systems, focusing on transdermal patches and microneedle technology. The company is dedicated to enhancing percutaneous absorption through innovative pharmaceutical compositions and adhesive patches. Medrx is also engaged in the development of colloidal solutions aimed at treating neurodegenerative conditions, positioning itself at the forefront of pharmaceutical innovation in the region.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

40 Patents

#5 in Kagawa

#1,980 in Japan

#17,068 in the World

Kagawa, JP
Kagawa, Japan

Medrx Co., Ltd

Forward Citations = 105

35 inventors:

goldMedal Hidetoshi Hamamoto (34 out of 37 patents)

silverMedal Katsunori Kobayashi (9 out of 9 patents)

bronzeMedal Masaki Ishibashi (8 out of 8 patents)

4.  Yasushi Miwa (7 out of 7 patents)

5.  Takahiro Tanimoto (7 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Medrx Co., Ltd. Retrieved from https://idiyas.com/company/medrx-company

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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