Environmental heating and cooling; fluid handling and sanitary e – Fluid handling or treatment equipment – Treatment
Design Patent
2007-03-20
2007-03-20
Webster, Robin (Department: 2911)
Environmental heating and cooling; fluid handling and sanitary e
Fluid handling or treatment equipment
Treatment
Design Patent
active
29232887
CLAIM:
We claim the ornamental design for a stepped filter housing, as shown and described.
REFERENCES:
patent: 4855041 (1989-08-01), Church et al.
patent: 5922196 (1999-07-01), Baumann
patent: 6120685 (2000-09-01), Carlson et al.
patent: 6488848 (2002-12-01), Smith
patent: 6835305 (2004-12-01), Baumann et al.
Stockhowe John W.
Watson William R.
Champion Laboratories, Inc.
Olson & Hierl Ltd.
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