Katsuhiro Matsumoto

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Glass substrate for magnetic disk and method for producing the same
- Patent number 8,092,280
- Issue date Jan 10, 2012
- Asahi Glass Company, Limited
- Mizuho Ishida
- B24 - GRINDING POLISHING
Information Patent Grant
Pellicle and method for manufacture thereof
- Patent number 6,475,575
- Issue date Nov 5, 2002
- Asahi Glass Company, Limited
- Yoshiaki Ikuta
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Apparatus for detecting discharge gap in electric discharge machining
- Patent number 4,728,764
- Issue date Mar 1, 1988
- NEC Corporation
- Katsuhiro Matsumoto
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR PRODUCING THE SAME
- Publication number 20120251760
- Publication date Oct 4, 2012
- Asahi Glass Company, Limited
- Mizuho ISHIDA
- B24 - GRINDING POLISHING
Information Patent Application
GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR PRODUCING THE SAME
- Publication number 20100136372
- Publication date Jun 3, 2010
- Asahi Glass Company, Limited
- Mizuho ISHIDA
- B24 - GRINDING POLISHING
Information Patent Application
METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISC
- Publication number 20090304976
- Publication date Dec 10, 2009
- Asahi Glass Company, Limited
- Katsuhiro MATSUMOTO
- G11 - INFORMATION STORAGE