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Patent applications and USPTO patent grants for International Environmental Systems, Inc., USA.The latest application filed is for "biological process for groundwater and wastewater treatment".
Patent | Date |
---|---|
Biological process for groundwater and wastewater treatment Grant 5,451,320 - Wang , et al. * September 19, 1 | 1995-09-19 |
Liquid treatment system with air emission control Grant 5,399,267 - Wang , et al. * March 21, 1 | 1995-03-21 |
Sequencing batch liquid treatment Grant 5,354,458 - Wang , et al. October 11, 1 | 1994-10-11 |
Combined coarse and fine bubble separation system Grant 5,275,732 - Wang , et al. January 4, 1 | 1994-01-04 |
Water and wastewater treatment system Grant 5,240,600 - Wang , et al. August 31, 1 | 1993-08-31 |
Method and apparatus for filtration with plural ultraviolet treatment stages Grant 5,236,595 - Wang , et al. * August 17, 1 | 1993-08-17 |
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