Calculator

Details Calculator Calculator

1996-03-13

2000-01-18

Mai, Tan V.

Boots, shoes, and leggings

341 27, 434113, G06F 300

Patent

active

060152249

ABSTRACT:
A calculator, comprising a keyboard having keys, each key having tactile symbols which indicate in Braille the numeral or function that the key represents. The calculator communicates its calculated numerical results visually, audibly, and tactiley. The tactile indication provides the result by a series of counting pulses, which represent the numerals in the result, the numerals separated by numerals spaces. The speed that the result is tactiley communicated is controllable by the user.

REFERENCES:
patent: 3932869 (1976-01-01), Kane
patent: 4024536 (1977-05-01), Anderson
patent: 4033053 (1977-07-01), Engler
patent: 4305067 (1981-12-01), Tretiakoff et al.
patent: 4334280 (1982-06-01), McDonald
patent: 4445871 (1984-05-01), Becker
patent: 5154614 (1992-10-01), Matsuoka et al.

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