Puzzle for teaching

Description

FIG. 1 is a front, top and side perspective view of the puzzle for teaching showing my new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end 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 plan view thereof.

Referenced Cited
U.S. Patent Documents
D8466 July 1875 Lyman
D91126 November 1933 Thompson
D163085 May 1951 Bishop
D219917 February 1971 Skinner
D235673 July 1975 Root
D316730 May 7, 1991 Yoshida
D320242 September 24, 1991 Slayton
3903617 September 1975 Evans
Foreign Patent Documents
492977 1954 ITX
816076 1959 GBX
Patent History
Patent number: D350772
Type: Grant
Filed: Dec 4, 1992
Date of Patent: Sep 20, 1994
Inventor: Marcus S. King (Everett, WA)
Primary Examiner: Wasllace R. Burke
Assistant Examiner: Pamela Burgess
Attorney: Terry M. Gernstein
Application Number: 0/2,239
Classifications