Portable air filtration unit


FIG. 1 is a perspective view taken from the front _and left side of a portable air filtration unit showing _my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a right side elevational view thereof; and

FIG. 6 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
D143097 December 1945 Schneider
D180098 April 1957 Mueller
D222687 November 1971 Adams
D231571 April 1974 Parker
D238979 February 1976 Perry et al.
1196539 August 1916 Goldberg
1298404 March 1919 Romanoff
3861894 January 1975 Marsh
Patent History
Patent number: D271338
Type: Grant
Filed: Mar 16, 1981
Date of Patent: Nov 8, 1983
Inventor: Hubert G. Dukowski (North Vancouver, British Columbia)
Primary Examiner: James R. Largen
Law Firm: Sughrue, Mion, Zinn, Macpeak and Seas
Application Number: 6/244,485
Current U.S. Class: D29/6; D23/149; D29/7
International Classification: D2999; D2304;