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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.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Apr 20 1988 | STACKHOUSE, WYMAN H | Stackhouse Associates | ASSIGNMENT OF ASSIGNORS INTEREST | 004884 | /0358 | |
Apr 20 1988 | WILLIAMSON, IAN M | Stackhouse Associates | ASSIGNMENT OF ASSIGNORS INTEREST | 004884 | /0358 | |
Apr 27 1988 | Stackhouse Associates | (assignment on the face of the patent) | / | |||
Dec 29 1988 | W STACKHOUSE ASSOCIATES, INC , A CA CORP | STACKHOUSE | ASSIGNMENT OF ASSIGNORS INTEREST | 005024 | /0185 | |
Dec 29 1988 | W STACKHOUSE ASSOCIATES, INC , A CA CORP | STACKHOUSE, WYMAN | ASSIGNMENT OF ASSIGNORS INTEREST | 005024 | /0185 | |
Dec 29 1988 | STACKHOUSE, WYMAN | STACK HOLDINGS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 005156 | /0628 | |
Dec 29 1988 | STACKHOUSE, MILDRED | STACK HOLDINGS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 005156 | /0628 | |
Jul 24 1995 | STACKHOUSE, WYMAN H | STACKHOUSE, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007629 | /0464 |
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