Bonnie A Greenstein

US Patent:

60152249, Jan 18, 2000

Filed:

Mar 13, 1996

Appl. No.:

8/614665

Inventors:

Bonnie Greenstein - Brooklyn NY

International Classification:

G06F 300

US Classification:

36471008

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.