Yoshihisa Ishihara

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Tochigi-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker unit, speaker system, and speaker diaphragm manufacturing m...
- Patent number 6,543,573
- Issue date Apr 8, 2003
- JSP Corporation
- Yoshihisa Ishihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Composite sheet having foamed polycarbonate resin layer and non-foa...
- Patent number 6,492,015
- Issue date Dec 10, 2002
- JSP Corporation
- Takeshi Aoki
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Process for producing foamed body of polycarbonate resin and foamed...
- Patent number 5,854,294
- Issue date Dec 29, 1998
- JSP Corporation
- Kuninori Hirosawa
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Speaker unit, speaker system, and speaker diaphragm manufacturing m...
- Publication number 20010050194
- Publication date Dec 13, 2001
- JSP CORPORATION
- Yoshihisa Ishihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE