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Patent applications and USPTO patent grants for Huang; Hai-Sheng.The latest application filed is for "automatic toilet cleaning device".
Patent | Date |
---|---|
Automatic toilet cleaning device Grant 8,136,171 - Huang March 20, 2 | 2012-03-20 |
Automatic Toilet Cleaning Device App 20100257662 - HUANG; Hai-Sheng | 2010-10-14 |
Safety device of two-way braking for a retractable door leaf App 20070095488 - Huang; Hai-Sheng | 2007-05-03 |
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