Ladder step extender

Description

FIG. 1 is an isometric view of the ladder step extender of this design;

FIG. 2 is a top view of the ladder step extender;

FIG. 3 is a left side view of the ladder step extender of this design;

FIG. 4 is a right side view of the ladder step extender;

FIG. 5 is a front view of the ladder step extender;

FIG. 6 is a back view of the ladder step extender; and,

FIG. 7 is a bottom view of the ladder step extender of this invention.

Referenced Cited
U.S. Patent Documents
D188758 September 1960 Parker
3294197 December 1966 Kwiatkowski
3503468 March 1970 Taylor, Sr.
4437544 March 20, 1984 Anderson et al.
4546853 October 15, 1985 Hanson
4972923 November 27, 1990 Kruse
5056620 October 15, 1991 Zumwalt et al.
5072808 December 17, 1991 Spalt et al.
5465809 November 14, 1995 Panicci
Patent History
Patent number: D390669
Type: Grant
Filed: May 30, 1997
Date of Patent: Feb 10, 1998
Inventors: Donald R. Armstrong (Duluth, MN), Phillip F. Bolf (Duluth, MN)
Primary Examiner: Doris Clark
Attorney: Richard J. Grundstrom
Application Number: 0/71,511
Classifications
Current U.S. Class: Stair Tread, Step Or Ladder Rung (D25/69)
International Classification: 2504;