Kiyoshi Yokokawa

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Patents Grantslast 30 patents

Information Patent Grant
Large sized quartz glass tube, large scale quartz glass preform, pr...
- Patent number 5,837,334
- Issue date Nov 17, 1998
- Heraeus Quarzglas GmbH
- Kiyoshi Yokokawa
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method for manufacturing large-sized quartz glass tube
- Patent number 5,785,729
- Issue date Jul 28, 1998
- Heraeus Quarzglas GmbH
- Kiyoshi Yokokawa
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method of producing quartz glass body
- Patent number 5,769,921
- Issue date Jun 23, 1998
- Heraeus Quarzglas GmbH
- Kiyoshi Yokokawa
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method and apparatus for supplying gaseous raw material
- Patent number 5,540,059
- Issue date Jul 30, 1996
- Shin-Etsu Quartz Products Co., Ltd.
- Kiyoshi Yokokawa
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...