Telephone keypad having a dual-switch button

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20010003539A1
SERIAL NO

09733803

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Abstract

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There is disclosed a telephone keypad apparatus having a dual-switch button in which each of switch contacts can be individually operated depending on the locations at which the buttons are pushed, by mounting two switches for every button in the telephone keypad. In accordance with the present invention, in a telephone keypad in which twelve push buttons are arranged in a grid shape, each of the buttons has two switches for connecting/disconnecting an electrical flow and the buttons are pushed freely right and left. If the left of the button key cap is pushed the left switch is connected, if the right of the button key cap is pushed the right switch is connected and if the middle of the button key cap is pushed both the switches are connected.

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Patent Owner(s)

Patent OwnerAddress
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEDAEJEON KOREA

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hahm, Jin Ho Taejon, KR 8 374
Park, Jung Soo Taejon, KR 59 302

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