Freezer ambient air exchange device
Description
FIG. 1 is a perspective view of the freezer ambient air exchange device embodying the design of the present invention;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is a side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom view thereof.
The vertical tubular portion has been broken away in the middle in FIGS. 1-5, to indicate indeterminate length.
Referenced Cited
U.S. Patent Documents
D297158 | August 9, 1988 | Marton et al. |
Patent History
Patent number: D338524
Type: Grant
Filed: Apr 24, 1992
Date of Patent: Aug 17, 1993
Inventors: Lars Allestad (Missoula, MT), Oscar Allestad (Missoula, MT)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Attorney: Terry M. Gernstein
Application Number: 7/873,054
Type: Grant
Filed: Apr 24, 1992
Date of Patent: Aug 17, 1993
Inventors: Lars Allestad (Missoula, MT), Oscar Allestad (Missoula, MT)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Attorney: Terry M. Gernstein
Application Number: 7/873,054
Classifications
Current U.S. Class:
Element Or Attachment, Not Elsewhere Specified (D23/386)