Hisayoshi Shimizu

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Chiyoda-ku, JP

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Patents Grantslast 30 patents

Information Patent Grant
Coloring master pellet for optical molded article and colored optic...
- Patent number 6,686,041
- Issue date Feb 3, 2004
- Teijin Chemicals LTD
- Akihiro Sakamoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
Colored master pellet for optical molded article and colored optica...
- Publication number 20030124351
- Publication date Jul 3, 2003
- Akihiro Sakamoto
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...