Yutaka Arai

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Chiyoda, JP

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Patents Grantslast 30 patents

Information Patent Grant
Self-propelled cleaning device and method of operation thereof
- Patent number 7,515,991
- Issue date Apr 7, 2009
- Hitachi, Ltd.
- Saku Egawa
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Self-propelled cleaning device and charger using the same
- Patent number 7,418,762
- Issue date Sep 2, 2008
- Hitachi, Ltd.
- Yutaka Arai
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Self-running vacuum cleaner
- Patent number 6,968,592
- Issue date Nov 29, 2005
- Hitachi, Ltd.
- Ikuo Takeuchi
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents

Information Patent Application
Self-propelled cleaning device and charger using the same
- Publication number 20040255425
- Publication date Dec 23, 2004
- Yutaka Arai
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Application
Self-propelled cleaning device and method of operation thereof
- Publication number 20040181896
- Publication date Sep 23, 2004
- Saku Egawa
- G05 - CONTROLLING REGULATING
Information Patent Application
Self-running vacuum cleaner
- Publication number 20020138936
- Publication date Oct 3, 2002
- Ikuo Takeuchi
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...