Environmental heating and cooling; fluid handling and sanitary e – Fluid handling or treatment equipment – Treatment
Patent
1997-09-12
1998-11-17
Douglas, Alan P.
Environmental heating and cooling; fluid handling and sanitary e
Fluid handling or treatment equipment
Treatment
2301
Patent
active
D04013069
REFERENCES:
patent: 3469707 (1969-09-01), Humbert et al.
patent: 4801383 (1989-01-01), Hoffman et al.
patent: 5443721 (1995-08-01), Kelada
Coulonvaux Paul R.
Dewit Johan G.
Ivarson Jeffrey J.
Schrage Kevin J.
Ward Dennis E.
Donaldson & Company, Inc.
Douglas Alan P.
Taylor Robin V.
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