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For the Inventor, By the Inventor

Minoh, Japan

Masayoshi Samejima

USPTO Granted Patents = 12

Average Co-Inventor Count = 3.1

ph-index = 11

Forward Citations = 372(Granted Patents)


Location History:

  • Minoh, JP (1980 - 1987)
  • Mino, JP (1990 - 1993)

Company Filing History:

goldMedal12 out of 324 
 
Tanabe Seiyaku Company, Limited
 patents
silverMedal1 out of 2,310 
 
Terumo Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1980-1993

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12 patents (USPTO):Explore Patents
1. 5254347 - Controlled release pharmaceutical preparation and method for producing (1993-10-19),
2. 5202129 - Process for micronizing slightly-soluble drug (1993-04-13),
3. 5068112 - Controlled release pharmaceutical preparation and method for producing (1991-11-26),
4. 4963365 - Controlled release dosage form (1990-10-16),
5. 4670261 - Parenteral alimentation solution (1987-06-02),
6. 4542042 - Process for preparing free-flowing ethylcellulose microcapsules (1985-09-17),
7. 4486471 - Process for preparing ethylcellulose microcapsules (1984-12-04),
8. 4462982 - Microcapsules and method of preparing same (1984-07-31),
9. 4443497 - Method of preparing microcapsules (1984-04-17),
10. 4411933 - Process for preparing ethylcellulose microcapsules (1983-10-25),
11. 4389331 - Process for preparing pharmaceutically active compound-containing (1983-06-21),
12. 4218333 - Process for the preparation of pharmaceutical substance-containing (1980-08-19),

Title: The Innovations of Masayoshi Samejima

Introduction

Masayoshi Samejima is a notable inventor based in Minoh, Japan. He has made significant contributions to the field of pharmaceuticals, holding a total of 12 patents. His work focuses on developing innovative drug formulations and methods that enhance the efficacy of pharmaceutical preparations.

Latest Patents

One of his latest patents is a controlled release pharmaceutical preparation and method for producing it. This invention involves a core containing a pharmaceutically active ingredient, which is coated with a porous film made of a hydrophobic polymeric substance. The controlled release pharmaceutical preparation is designed to achieve a desired dissolution rate by controlling the porosity of the film. Another significant patent is a process for micronizing slightly-soluble drugs. This process involves subjecting a mixture of the drug and a sugar or sugar alcohol to high-speed stirring or impact comminution, resulting in a micronized drug with an average diameter of less than 2-3 mm.

Career Highlights

Masayoshi Samejima has worked with prominent companies in the pharmaceutical industry, including Tanabe Seiyaku Company, Limited and Terumo Kabushiki Kaisha. His experience in these organizations has allowed him to develop and refine his innovative approaches to drug formulation.

Collaborations

Throughout his career, Samejima has collaborated with esteemed colleagues such as Goichi Hirata and Kazuo Noda. These

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