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US 3,937,939 AGranted
Single-hand digital calculator
OwnerMarvin A. Frenkelinventor
Life of this patent
Estimating the term…
Abstract
An electronic digital calculator, the calculator being in the form of an elongated tubular body having a size and shape similar to a pen or pencil and having a plurality of input valve setting keys and function keys carried on its surface as well as illuminable "read-out", or display, screen. The value setting keys and the function keys are arranged on the surface of the tubular body such that the calculator can be used while held in one hand of the user.
Claims15
An electronic digital calculator comprising an elongated cylindrical tubular body;
- a plurality of input value setting keys mounted on and carried on the outer surface of said tubular body;
- a plurality of function keys mounted on and carried on the outer surface of said tubular body;
- a display readout screen mounted on said tubular body for visible scanning of the calculation being performed;
- an electronic chip housed within said tubular body and electrically connected to said value setting keys, said function keys, and said read-out screen;
- and, battery means housed within said tubular body for providing a source of electrical power to said electronic chip, said valve setting keys and said function keys being arranged on the outer surface of said tubular body such that they can be manually actuated by the fingers of one hand of a user while held in said hand.
2 more elements
Dependencies are inferred from the claim text.