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Patent applications and USPTO patent grants for Polk; Steven.The latest application filed is for "solar energy collector".
Patent | Date |
---|---|
Solar energy collector Grant 10,171,024 - Polk J | 2019-01-01 |
Solar Energy Collector App 20160380577 - Polk; Steven | 2016-12-29 |
Solar energy collector Grant 9,443,999 - Polk September 13, 2 | 2016-09-13 |
Solar collector Grant 8,662,072 - Butler , et al. March 4, 2 | 2014-03-04 |
Solar Energy Collector App 20140014159 - Polk; Steven | 2014-01-16 |
Solar Collector App 20110179791 - Butler; Barry L. ;   et al. | 2011-07-28 |
Solar power plant Grant 7,669,592 - Polk March 2, 2 | 2010-03-02 |
Solar power plant App 20070221210 - Polk; Steven | 2007-09-27 |
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