Patent
   D304854
Priority
Apr 27 1988
Filed
Apr 27 1988
Issued
Nov 28 1989
Expiry
Nov 28 2003
Assg.orig
Entity
unknown
13
4
n/a
The ornamental design for a portable air filter, as shown.

FIG. 1 is a perspective view of a portable air filter illustrating our new design;

FIG. 2 is a front elevational view thereof, on a reduced scale;

FIG. 3 is a rear elevational view thereof, on a reduced scale;

FIG. 4 is a top plan view thereof, on a reduced scale;

FIG. 5 is a right side elevational view thereof, on a reduced scale;

FIG. 6 is a left side elevational view thereof, on a reduced scale; and

FIG. 7 is a bottom plan view thereof, on a reduced scale;

Stackhouse, Wyman H., Williamson, Ian M.

Patent Priority Assignee Title
11686484, Jul 29 2021 Virus elimination assembly
6370695, Jan 16 1998 Depuy Orthopaedics, Inc. Head gear apparatus
6393617, Jan 16 1998 Depuy Orthopaedics, Inc. Head gear apparatus
6513168, Jan 16 1998 Depuy Orthopaedics, Inc. Head gear apparatus
6711748, Jan 16 1998 DEPUY SYNTHES PRODUCTS, INC Head gear apparatus having movably mounted fan
6990691, Jul 18 2003 DePuy Products, Inc.; DEPUY PRODUCTS, INC Head gear apparatus
7200873, Jul 18 2003 DePuy Products, Inc. Head gear apparatus having improved air flow arrangement
7937779, Jul 18 2003 DePuy Products Head gear apparatus having improved air flow arrangement
D566256, May 11 2005 Nonox Ltd. Filtering device
D696760, Nov 09 2012 Altapure, LLC Aerosol generator
D741985, Apr 16 2013 FIH (Hong Kong) Limited Exhaust gas treatment apparatus
D745129, Aug 08 2013 Amano Corporation Industrial air cleaner
ER2722,
Patent Priority Assignee Title
4786295, Oct 01 1987 GPAC, INC Filtration device for airborne contaminants
4838910, Sep 18 1987 CRITICAL INDUSTRIES, INC , A CORP Air driven filtration system
D271338, Sep 16 1980 Portable air filtration unit
D295216, Oct 30 1986 D. Morris Sheet Metal, Inc. Combined air filter and cleaner unit
////////
Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 20 1988STACKHOUSE, WYMAN H Stackhouse AssociatesASSIGNMENT OF ASSIGNORS INTEREST 0048840358 pdf
Apr 20 1988WILLIAMSON, IAN M Stackhouse AssociatesASSIGNMENT OF ASSIGNORS INTEREST 0048840358 pdf
Apr 27 1988Stackhouse Associates(assignment on the face of the patent)
Dec 29 1988W STACKHOUSE ASSOCIATES, INC , A CA CORP STACKHOUSEASSIGNMENT OF ASSIGNORS INTEREST 0050240185 pdf
Dec 29 1988W STACKHOUSE ASSOCIATES, INC , A CA CORP STACKHOUSE, WYMANASSIGNMENT OF ASSIGNORS INTEREST 0050240185 pdf
Dec 29 1988STACKHOUSE, WYMANSTACK HOLDINGS, INC ASSIGNMENT OF ASSIGNORS INTEREST 0051560628 pdf
Dec 29 1988STACKHOUSE, MILDREDSTACK HOLDINGS, INC ASSIGNMENT OF ASSIGNORS INTEREST 0051560628 pdf
Jul 24 1995STACKHOUSE, WYMAN H STACKHOUSE, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0076290464 pdf
n/a
Date Maintenance Fee Events


n/a
Date Maintenance Schedule