Calculator

Description

FIG. 1 is a left end elevational view of a calculator showing my new design;

FIG. 2 is a right end elevational view;

FIG. 3 is a front elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view; and

FIG. 6 is a top plan view.

Referenced Cited
U.S. Patent Documents
D146801 May 1947 Lens
D224019 June 1972 Kalvitis
D234360 February 1975 Duncan
D263136 February 23, 1982 Gore
Patent History
Patent number: D287978
Type: Grant
Filed: Dec 26, 1984
Date of Patent: Jan 27, 1987
Assignee: Industrial Maintenance Systems, Inc. (Pittsburgh, PA)
Inventor: John M. Zatezalo (Pittsburgh, PA)
Primary Examiner: Louis S. Zarfas
Law Firm: Buell, Ziesenheim, Beck & Alstadt
Application Number: 6/686,422
Classifications
Current U.S. Class: With Keyboard (D18/7)