Dong; Zhenxing
Patent Applications and Registrations
Patent applications and USPTO patent grants for Dong; Zhenxing.The latest application filed is for "disc check valve construction".
- Dong; Zhenxing - Brighton MA US
- Dong; Zhenxing - Toronto CA
| Patent | Date |
|---|---|
| Disc check valve construction Grant 8,689,824 - Dong April 8, 2 | 2014-04-08 |
| Check valve construction Grant 8,528,592 - Dong September 10, 2 | 2013-09-10 |
| Disc check valve construction App 20120241030 - Dong; Zhenxing | 2012-09-27 |
| Check valve construction App 20120216884 - Dong; Zhenxing | 2012-08-30 |
| Apparatus and method for simulation of combustion effects in a fireplace App 20070125367 - Lim; Alvin ; et al. | 2007-06-07 |
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