Guiqing Xu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cleaning method of oil tank and cleaning device of same
- Patent number 10,130,978
- Issue date Nov 20, 2018
- Softard Industries Co., Ltd.
- Katsuhiko Kawakami
- B08 - CLEANING
Information Patent Grant
Method of cleaning and maintaining petroleum refining plants
- Patent number 6,273,102
- Issue date Aug 14, 2001
- Softard Industries Co., Ltd.
- Katsuhiko Kawakami
- B08 - CLEANING

Patents Applicationslast 30 patents

Information Patent Application
CLEANING METHOD OF OIL TANK AND CLEANING DEVICE OF SAME
- Publication number 20160107206
- Publication date Apr 21, 2016
- SOFTARD INDUSTRIES CO., LTD.
- Katsuhiko Kawakami
- B08 - CLEANING