Current Practice Areas

Mr. Kyohei Hagiwara’s practice focuses on the Preparation and Prosecution of Domestic and International Patent Applications, Invention Mining, and IP Consulting to provide legal and technical expertise to clients.

Technical Fields
Mr. Hagiwara’s experience covers a wide range of technical fields including Organic Chemistry, Inorganic Chemistry, Metals, and Device Structures.

In detail, Mr. Hagiwara has extensive experience in general areas of the Chemical and Material fields.
He is particularly well-versed in Moldings, Polymer Materials, Inorganic Materials, Battery Materials, Semiconductor Materials, Electronic Equipment Materials, Optical Materials, Packaging Materials, Barrier Materials, Coating Materials, Foods, Beverages, and so forth.

Mr. Hagiwara’s experiences in research and technical development while working at a Japanese chemical manufacturer provides him with understanding of the stance of the inventor and the site of the invention to provide concrete and realistic advise to his clients.


Mr. Hagiwara worked for a Japanese chemical manufacturer, engaging in the research and technical development of lithium ion battery materials and industrial barrier materials.
Particularly, in the research and technical development of lithium ion battery materials, Mr. Hagiwara conducted a wide range of tasks including developing a new grade of lithium ion battery materials, applying for patents, researching and dealing with competitors’ patents, studying possible mass-production of the new grade lithium ion battery materials, providing technical follow-ups to customers, and so on.


● Coauthor. “New Patent Practice Manual of Numerical Limitation Inventions and Parameter Inventions – Best Use of Development Results and Measures against Competitors’ Patents”, Tokyo: JOHOKIKO Co., Ltd., August 2018 (in Japanese)
● Coauthor. “How to Deal with Reasons for Rejection in Chemical and Material Patents”, Tokyo: Science & Technology Co., Ltd., February 2017 (in Japanese).