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Patent applications and USPTO patent grants for Northcut; Douglas W..The latest application filed is for "reverse osmosis, liquid filter system with ultraviolet filtration".
Patent | Date |
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Reverse osmosis liquid filter system with ultraviolet filtration Grant 6,521,124 - Northcut , et al. February 18, 2 | 2003-02-18 |
Reverse osmosis, liquid filter system with ultraviolet filtration App 20020158001 - Northcut, Donald A. ;   et al. | 2002-10-31 |
Multi-element, reverse osmosis, liquid filter system with flushing and filtering circuits Grant 6,423,223 - Northcut , et al. July 23, 2 | 2002-07-23 |
Multi-element, reverse osmosis, liquid filter system with flushing and filtering circuits App 20020023865 - Northcut, Donald A. ;   et al. | 2002-02-28 |
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