Method and apparatus for alphanumeric data entry using a keypad

Details Method and apparatus for alphanumeric data entry using a keypad Method and apparatus for alphanumeric data entry using a keypad

2005-01-25

2005-01-25

Eng, George (Department: 2643)

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

C379S093180, C345S172000

Reexamination Certificate

active

06847706

ABSTRACT:
A keypad for entering letters includes an array of keys with each key being assigned to at least one letter of an alphabetical system based on the frequency of occurrence of the least one letter in a typical body of written work. Thealphabetical system comprises at least one most-frequently-occurring letter that is entered by activation of the same key twice and at least one less-frequently-occurring letter that is entered by activation of two different keys.

REFERENCES:
patent: 3967273 (1976-06-01), Knowlton
patent: 4008793 (1977-02-01), Terracina
patent: 4427848 (1984-01-01), Tsakanikas
patent: 5339358 (1994-08-01), Danish et al.
patent: 5818437 (1998-10-01), Grover et al.
patent: 6231252 (2001-05-01), Kitamura
patent: 6518957 (2003-02-01), Lehtinen et al.

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