Masayuki Umehara

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Shizuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Arc tube and method of producing the same
- Patent number 6,843,698
- Issue date Jan 18, 2005
- Koito Manufacturing Co., Ltd.
- Yoshihiro Mochizuki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Arc tube with pinch seal and dimensional relationship and method fo...
- Patent number 6,653,785
- Issue date Nov 25, 2003
- Koito Manufacturing Co., Ltd.
- Michio Takagaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of producing an arc tube
- Patent number 6,557,379
- Issue date May 6, 2003
- Koito Manufacturing Co., Ltd.
- Masakazu Nagasawa
- C03 - GLASS MINERAL OR SLAG WOOL
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
Information Patent Grant
Halogen lamp having thick wall pinch seal portion
- Patent number 6,215,236
- Issue date Apr 10, 2001
- Koito Manufacturing Co., Ltd.
- Hiroshi Gotoh
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electric lamp with a base
- Patent number 5,994,825
- Issue date Nov 30, 1999
- Koito Manufacturing Co., Ltd.
- Hiroshi Goto
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Discharge bulb
- Publication number 20040051460
- Publication date Mar 18, 2004
- KOITO MANUFACTURING CO., LTD.
- Masaya Shido
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ARC tube and method of producing the same
- Publication number 20030232564
- Publication date Dec 18, 2003
- KOITO MANUFACTURING CO., LTD.
- Yoshihiro Mochizuki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Arc tube and method for forming the same
- Publication number 20020105272
- Publication date Aug 8, 2002
- KOITO MANUFACTURING CO., LTD.
- Michio Takagaki
- H01 - BASIC ELECTRIC ELEMENTS