Air filter

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Description

FIG. 1 is a top perspective view of an air filter showing my new design;

FIG. 2 is a bottom perspective view thereof; and

FIG. 3 is a side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D151464 October 1948 Olsen
D174841 May 1955 Trombley
D178322 July 1956 Kasper
D187065 January 1966 Chapman
D235547 June 1975 Schimanski
2810451 October 1957 Crisp
3290865 December 1966 Serou et al.
3481116 December 1969 Ferri
Patent History
Patent number: D252640
Type: Grant
Filed: Sep 10, 1976
Date of Patent: Aug 14, 1979
Inventor: Bill Nederman (S-252 33 Helsingborg)
Primary Examiner: James R. Largen
Attorney: John J. Dennemeyer
Application Number: 5/722,212
Classifications
Current U.S. Class: D23/149; D15/54
International Classification: D2304;