Kazumasa Sugiyama

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Shimizu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electric light bulb with base held by positioning ring having elast...
- Patent number 6,528,931
- Issue date Mar 4, 2003
- Koito Manufacturing Co., Ltd.
- Masayuki Umehara
- H01 - BASIC ELECTRIC ELEMENTS