Boots – shoes – and leggings
Patent
1982-09-28
1985-11-12
Thomas, James D.
Boots, shoes, and leggings
364709, 400 78, 400 80, G06F 700
Patent
active
045532192
ABSTRACT:
A typewriter having a calculating function, comprising: a keyboard having a plurality of character keys including letter, numeral and arithmetic symbol keys; an arithmetic unit for performing an arithmetic operation designated by at least one of the arithmetic symbol keys, based on plural sets of numeric data each representing a numerical value and entered through the numeral keys; a main control unit for selecting the plural sets of numeric data as operands from among successive sets of data entered corresponding to the sequential operation of the character keys, such that only the set of numeric data which is entered last prior to each operation of any one of the arithmetic symbol keys is regarded as one of the plural sets of numeric data representing the operands, the main control unit directing the arithmetic unit to perform the arithmetic operation based on the selected plural sets of numeric data or operands, and reading out a result of the arithmetic operation from the arithmetic unit; and a printing device printing a succession of characters entered by the character keys, and the result of arithmetic operation read out by the main control unit, the result being printed following the succession of characters entered through the keyboard. There is also disclosed a method of printing on a typewriter a succession of characters including a statement representing an arithmetic operation. The printing method includes a step of judging whether a set of numeric data is to represent an operand of the arithmetic operation or not.
REFERENCES:
patent: 3265874 (1966-08-01), Soule, Jr. et al.
patent: 4106101 (1978-08-01), Harrison
patent: 4319130 (1982-03-01), Spitzner
patent: 4402056 (1983-08-01), Sado et al.
Brother Kogyo Kabushiki Kaisha
Shaw Dale M.
Thomas James D.
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