Wai; Lau Ying
Patent Applications and Registrations
Patent applications and USPTO patent grants for Wai; Lau Ying.The latest application filed is for "cyclonic chamber for air filtration devices".
- Wai; Lau Ying - Kowloon HK
- Wai; Lau Ying - Kowloon Bay HK
- Wai; Lau Ying - Hong Kong CN
| Patent | Date |
|---|---|
| Cyclonic chamber for air filtration devices Grant 8,167,964 - Wai May 1, 2 | 2012-05-01 |
| Upright vacuum cleaner Grant D633,666 - Wai March 1, 2 | 2011-03-01 |
| Cyclonic Chamber for Air Filtration Devices App 20100257825 - Wai; Lau Ying | 2010-10-14 |
| Cyclonic chamber for air filtration devices Grant 7,789,922 - Wai September 7, 2 | 2010-09-07 |
| Rotating brush attachment for use with a vacuum App 20060272121 - Wai; Lau Ying | 2006-12-07 |
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