Bubble diffuser

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Description

FIG. 1 is a perspective view of a bubble diffuser showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D246109 October 18, 1977 Rosaen
D264617 May 25, 1982 Freeman
1956524 April 1934 Byram
3289847 December 1966 Rothemund
3304912 February 1967 Hackman et al.
3314396 April 1967 Willinger
4481905 November 13, 1984 Fonseca
4522151 June 11, 1985 Arbisi et al.
Foreign Patent Documents
2811943 September 1979 DEX
Other references
  • Zenco Novelty Co. Products Catalog; p. 67, Item 851, (center p.), Stem For Filter and Air Releasers. Living World Catalog; .COPYRGT.1977; p. 24; Item 88715, Hush I.RTM. Air Pump & Filter Kit. Metaframe Catalog No. 70; .COPYRGT.1970; p. 40; Bubble-Up Airstone, Item No. 335, (top, left corner).
Patent History
Patent number: D324279
Type: Grant
Filed: Aug 21, 1989
Date of Patent: Feb 25, 1992
Assignee: Aeromix Systems, Incorporated (Minneapolis, MN)
Inventor: Peter S. Gross (Plymouth, MN)
Primary Examiner: A. Hugo Word
Assistant Examiner: Cathy Anne MacCormac
Law Firm: Kinney & Lange
Application Number: 7/397,171
Classifications
Current U.S. Class: Element Or Attachment (D30/106)