Automated public phone control for charge and collect billing

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4935956
SERIAL NO

07342594

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The charge and collect-call functions of a public telephone are arranged automatically by a microcomputer system preferably connected on customer premises between the phone terminal instrument and the local loop, wherein control of said instrument, network signaling and call placement voice prompting of the call parties, recognition of responses from the parties and the network, call detail records of numbers and timings, and data communications with other computers are accomplished by the microcompter system without requiring human operator assistance or the transmission of calls over excessive distances to reach such an operator.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
SECURUS TECHNOLOGIES INC14651 DALLAS PARKWAY SUITE 600 DALLAS TX 75254-7476
T-NETIX INC14651 DALLAS PARKWAY SUITE 600 DALLAS TX 75254
EVERCOM SYSTEMS INC14651 DALLAS PARKWAY SUITE 600 DALLAS TX 75254

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hellwarth, David C Sausalito, CA 1 386
Hellwarth, George A Dallas, TX 2 556
Hellwarth, James B Sausalito, CA 1 386
Hellwarth, Jan G Dallas, TX 1 386

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