Electronic calculator for feet-inch-fraction numerics

Details Electronic calculator for feet-inch-fraction numerics Electronic calculator for feet-inch-fraction numerics

1976-06-04

1978-03-28

Malzahn, David H.

Boots, shoes, and leggings

235310, G06F 302, G06F 502

Patent

active

040818594

ABSTRACT:
An apparatus is disclosed for automatically adding, subtracting, multiplying and dividing feet, inches and fractions of an inch and for the recordation of the results of said arithmetic functions on a visual display. The apparatus also automatically and directly converts feet, inches and fractions of an inch into decimal equivalents and into the metric system of measurement and, similarly, converts numbers in decimal numeric and in metric measurement automatically and directly into feet, inches and fractions of an inch.

REFERENCES:
patent: 3654449 (1972-04-01), Boyce
patent: 3739161 (1973-06-01), Gross et al.
patent: 3809872 (1974-05-01), Yamamura et al.
patent: 3816731 (1974-06-01), Jennings et al.
patent: 3973113 (1976-08-01), Goldsamt
patent: 3983380 (1976-09-01), Sharif et al.

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