Ma; Chengguo
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ma; Chengguo.The latest application filed is for "heat exchange flue and heat exchange device".
- Ma; Chengguo - Shuangyashan City Heilongjiang
- Ma; Chengguo - Shuangyashan N/A CN
| Patent | Date |
|---|---|
| Heat Exchange Flue and Heat Exchange Device App 20220178536 - Ma; Chengguo ; et al. | 2022-06-09 |
| Convective heat transfer flue Grant 9,435,564 - Ma September 6, 2 | 2016-09-06 |
| Convective Heat Transfer Flue App 20160169554 - Ma; Chengguo | 2016-06-16 |
| Stoker grates for circulating combustible material Grant 8,051,786 - Ma November 8, 2 | 2011-11-08 |
| Stoker grates for circulating combustible material App 20080156238 - Ma; Chengguo | 2008-07-03 |
| Stoker grates for circulating burning-up App 20050199163 - Ma, Chengguo | 2005-09-15 |
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