Patent
   D316447
Priority
Sep 19 1989
Filed
Sep 19 1989
Issued
Apr 23 1991
Expiry
Apr 23 2005
Assg.orig
Entity
unknown
16
2
n/a
The ornamental design for a negative pressure air filtration housing, as shown.

FIG. 1 is a perspective view of a negative pressure air filtration housing showing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front end elevation view thereof; and

FIG. 7 is a rear end elevational view thereof.

Kondo, Kenneth S., Woodson, James C., Mumford, Ron W.

Patent Priority Assignee Title
D465018, Mar 04 2001 FUMEX AB Mobile filter unit
D566256, May 11 2005 Nonox Ltd. Filtering device
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D690026, May 03 2010 RHINOSYSTEMS, INC Portion cup
D696760, Nov 09 2012 Altapure, LLC Aerosol generator
D737421, May 04 2012 GIRBAU, S A Protective housing for a suction-assisted charging device in a clothes spin-drier
D739552, May 03 2010 RhinoSystems, Inc. Portion cup
D755359, Nov 27 2014 Rentschler Reven GmbH Air cleaner
D763463, May 03 2010 RhinoSystems, Inc. Portion cup
D840011, Jun 06 2017 ADEMCO INC Dehumidifier
D877871, Jun 19 2017 THERMO KING LLC Evaporator unit
D884861, Jun 06 2017 Ademco Inc. Dehumidifier
D886270, Apr 25 2017 Naomi-Grills B.V. Desiccant dehumidifier
D903142, May 03 2010 RhinoSystems, Inc. Portion cup
D946735, Jun 12 2019 Ventilation case
Patent Priority Assignee Title
4604111, Nov 23 1981 GPAC, INC Particulate contamination control method and filtration device
4883512, Feb 21 1989 Portable isolation enclosure
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Sep 15 1989WOODSON, JAMES C CRITICAL INDUSTRIES, INC , A CORP OF DEASSIGNMENT OF ASSIGNORS INTEREST 0054360003 pdf
Sep 15 1989MUMFORD, RON W CRITICAL INDUSTRIES, INC , A CORP OF DEASSIGNMENT OF ASSIGNORS INTEREST 0054360003 pdf
Sep 15 1989KONDO, KENNETH S CRITICAL INDUSTRIES, INC , A CORP OF DEASSIGNMENT OF ASSIGNORS INTEREST 0054360003 pdf
Sep 19 1989Critical Industries, Inc.(assignment on the face of the patent)
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