Voice mail system with improved detection and cancellation

United States of America Patent

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Dec 5, 1989
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N/A
app pub date
Dec 1, 1987
filing date
Dec 1, 1987

priority date (Note)
Expired

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Abstract

A voice mail system includes method and apparatus for muting a previously recorded audio signal upon detection of a DTMF signal to differentiate between recorded DTMF signals and valid DTMF commands. A DTMF signal detected after muting is recognized as an invalid command.

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Patent Owner(s)

Patent Owner	Address
COBOTYX CORPORATION INC	20 MIRY BROOK RD DANBURY CT 06810

International Classification(s)

H04M:TELEPHONIC COMMUNICATION

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Hanson, Paul G	Portland, OR	1	17
Klarquist, Thomas D	Beaverton, OR	2	49
Nepple, Bruce C	Portland, OR	9	254
O'Brien, Dennis J	West Linn, OR	6	140
Park, Michael C	Portland, OR	37	3197
Rosas, Robin R	Beaverton, OR	3	126

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Voice mail system with improved detection and cancellation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07127338

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PATENT NO	4885763
SERIAL NO	07127338
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07127338

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