USD223683S - Slide rule - Google Patents

Description

Des. 223,683 Ca Patented May 23, 1972 United States Patent 0 SLIDE RULE Addison W. Learned Ill and Rosalie C. Learned, both of 88 Dorset Road, Holliston, Mass. 01746 Filed Aug. 5, 1970, Ser. No. 24,314

Term of patent 7 years Int. Cl. D1099 US. Cl. D52--6 FIG. 1 is a top plan view of a slide rule showing our new design;

FIG. 2 is a right end view of FIG. 1, the opposite view being a mirror image thereof;

FIG. 3 is bottom edge view of FIG. 1, the top edge view being a mirror image thereof; and

FIG. 4 is a top plan view of FIG. 1 wherein the slide portion is in an extended position.

We claim:

The ornamental design, for a slide rule, substantially as shown and described.

nuummmm Des. 223,683

PAGE 2 References Cited UNITED STATES PATENTS 3,323,718 6/1967 Warner 2-35-70 2,530,047 11/1950 Dewar 235'70 2,452,417 10/1948 Zentis 235-70 EDWIN H. HUNTER, Primary Examiner N. C. HOLTJE, Assistant Examiner

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