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73290055 16 Dec 1980 | on 01 Aug 1988 | Injectors for Mass Transfer of Chemicals or Gases into a Moving Fluid ... Class 007 Class 007 Machinery Products Injectors for Mass Transfer of Chemicals or Gases into a Moving Fluid Stream, for Filtration and Water Treatment Systems | | | MICRO-SHEAR Johnson; Dennis E. J.
73289980 16 Dec 1980 | on 30 Jul 1988 | Automatic Backwash Filters for Minute Solids Removal for Filtration an... Class 011 Class 011 Environmental Control Instrument Products (lighting,heating,cooling,cooking) Automatic Backwash Filters for Minute Solids Removal for Filtration and Water Treatment Systems | |