Ryuji Sakasai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and instrument for measuring inside diameter of conduit
- Patent number 6,895,681
- Issue date May 24, 2005
- Tokyo Gas Co., Ltd.
- Yasushi Yonemura
- B08 - CLEANING

Patents Applicationslast 30 patents

Information Patent Application
Method and instrument for measuring inside diameter of conduit
- Publication number 20040111910
- Publication date Jun 17, 2004
- Yasushi Yonemura
- B08 - CLEANING