Pen type electronic digital calculator

Details Pen type electronic digital calculator Pen type electronic digital calculator

1977-06-24

1978-12-05

Smith, Jerry

Boots, shoes, and leggings

200 5A, 364708, 364709, G06F 302, G06F 1502

Patent

active

041288890

ABSTRACT:
A pen type electronic digital calculator in which keys are arranged in three rows on one half part of the tubular body in its lengthwise direction and when the three rows of keys are held substantially horizontal, the top surface of each key of the central row is higher than the top surfaces of the keys of the other rows. The keys of the respective rows are mounted so that they are longitudinally spaced from the keys of adjacent rows, and each key is disposed at the center of a recess formed in the tubular body.

REFERENCES:
patent: 3937939 (1976-02-01), Frenkel
patent: 3940758 (1976-02-01), Margolin
patent: 4007364 (1977-02-01), Ojima et al.
patent: 4029915 (1977-06-01), Ojima

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