TUNG AN DEVELOPMENT LTD.

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Hsinchu County, TW

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Patents Grantslast 30 patents

Information Patent Grant
Device of bi-spiral cleaning brush
- Patent number 11,109,667
- Issue date Sep 7, 2021
- Tung An Development Ltd.
- Chih-An Ku
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Device of cleaning brush
- Patent number 10,758,946
- Issue date Sep 1, 2020
- Tung An Development Ltd.
- Chih-An Ku
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Cleaning cylinder apparatus
- Patent number 8,950,032
- Issue date Feb 10, 2015
- Tung An Development Ltd.
- Tung-Chung Cheng
- B08 - CLEANING

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Patents Applicationslast 30 patents

Information Patent Application
Device Having Cleaning Bodies
- Publication number 20230178360
- Publication date Jun 8, 2023
- TUNG AN DEVELOPMENT LTD.
- Chih-An Ku
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Device of Bi-Spiral Cleaning Brush
- Publication number 20210112961
- Publication date Apr 22, 2021
- TUNG AN DEVELOPMENT LTD.
- Chih-An Ku
- A46 - BRUSHWARE
Information Patent Application
Device of Cleaning Brush
- Publication number 20200230656
- Publication date Jul 23, 2020
- TUNG AN DEVELOPMENT LTD.
- Chih-An Ku
- B08 - CLEANING
Information Patent Application
Cleaning Cylinder Apparatus
- Publication number 20120096660
- Publication date Apr 26, 2012
- TUNG AN DEVELOPMENT LTD.
- Tung-Chung Cheng
- B08 - CLEANING
Information Patent Application
Cleaning Apparatus for Sophisticated Electric Device
- Publication number 20100212100
- Publication date Aug 26, 2010
- TUNG AN DEVELOPMENT LTD.
- Chih-An Ku
- B08 - CLEANING