Combined ruler and writing instrument unit

Description

FIG. 1 is a top perspective view of a combined ruler and writing instrument unit showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a right end elevational view;

FIG. 5 is a left end elevational view;

FIG. 6 is a right side elevational view;

FIG. 7 is a left side elevational view; and

FIG. 8 is a top perspective view in an exploded condition with the writing tip portion of the writing instrument barrels shown in a fully extended condition.

Referenced Cited
U.S. Patent Documents
181236 August 1876 Wyckoff
D185045 April 1959 Slaton
185977 January 1877 Smith
D193410 August 1962 Reichenthal
D258911 April 14, 1981 Sandel
D261612 November 3, 1981 Henkels
D264824 June 8, 1982 Sandel
D267552 January 11, 1983 Seely, Jr. et al.
D272421 January 31, 1984 Sandel
422701 March 1890 Benzinger et al.
469593 February 1892 Patterson
1227614 May 1917 Hauptman
2026768 January 1936 Aronson
2277452 March 1942 Pettersen
2342476 February 1944 McEvoy et al.
3195235 July 1965 Regan
Patent History
Patent number: D318489
Type: Grant
Filed: Nov 17, 1988
Date of Patent: Jul 23, 1991
Inventor: Hu Cho-Kai (Taipei)
Primary Examiner: Bruce W. Dunkins
Assistant Examiner: Martha Thompson
Law Firm: Armstrong, Nikaido, Marmelstein, Kubovcik & Murray
Application Number: 7/272,654