Coil operated telephone

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4768227
SERIAL NO

07067656

1 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A self-contained, pre-pay coin operated telephone wherein when the user removes a handset from a switchhook, a local dial tone is generated, prompting the user to enter a telephone number of a called party. Once the first digit of that telephone number has been entered, the locally generated dial tone is removed and the user completes the entry of the telephone number. Once the proper coin has been deposited, the internal computer causes the telephone to couple itself to a central office. The telephone number entered by the user is then sent to the central office under control of the internal computer. During this time, the microphone in the handset is muted such that the user cannot communicate through the telphone. Once the user hears the called party answering, then the user must actuate a push-to-talk switch to indicate to the computer that the party has answered. Once this occurs, the muting is disabled allowing the user to speak to the called party and deposited coins are retained at the termination of the call. If the call is terminated without the push-to-talk switch being actuated, then deposited coins are returned to the user. Restricting incoming calls to prevent the user from accepting collect calls is accomplished by the phone answering the incoming call of approximately one second, then automatically dropping the incoming call, thereby readying the telephone for initiation of an outgoing call. Alternatively, a minimum charge, or no charge, can be required to answer an incoming call.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SEISCOR TECHNOLOGIES, INC.TULSA, OK0

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dively, Lee V Tulsa, OK 3 80
Grubbs, Jack M Tulsa, OK 2 45

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (2)
* 4429188 Telephone call screener 27 1981
* 4439636 Credit card actuated telecommunication access network 224 1982
 
SEISCOR TECHNOLOGIES, INC. (1)
* 4698840 Coin operated telephone 27 1985
 
GENERAL TELEPHONE OF FLORIDA, A FLA CORP. (1)
* 4538028 Apparatus for use with key telephone system with wireless telephone device 17 1983
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Digital Telecommunications Systems, Inc. (1)
* 4947422 Personalized telephone for automatic access to operator services 33 1989
 
Other [Check patent profile for assignment information] (1)
* 6335970 Automatic coin collection device for a payphone provided with no coin collection signal 0 1999
 
SECURUS TECHNOLOGIES, INC. (9)
* 5319702 Method and apparatus for detecting and responding to hook flash events occurring on a remote telephone 81 1992
* 5805685 Three way call detection by counting signal characteristics 72 1995
* 5796811 Three way call detection 51 1996
7899167 Centralized call processing 27 2003
8000269 Call processing with voice over internet protocol transmission 6 2004
7916845 Unauthorized call activity detection and prevention systems and methods for a Voice over Internet Protocol environment 2 2006
7529357 Inmate management and call processing systems and methods 43 2007
8340260 Inmate management and call processing systems and methods 6 2009
9560193 Systems and methods for detecting a call anomaly using biometric identification 0 2015
 
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION (1)
6320946 Information payphone 36 1999
 
QUORTECH GLOBAL SOLUTIONS, INC. (1)
* 6304643 Pay phone deposit method for limiting overpayment by a customer 0 1999
 
WINBOND ELECTRONICS CORP. (1)
* 5987120 Device for identifying line reversal/ringing signal of a telephone set 3 1997
 
Nicolet Plastique Ltd. (1)
D314184 Combined wall plate and switches 10 1988
 
Unisys Corporation (1)
* 5535264 Prompt issuing protocol for an intercept voice messaging system 17 1995
 
INTELLICALL, INC. (1)
* 6014433 Dynamic escrow type detection system 0 1997
 
SCIENCE DYNAMICS CORPORATION (1)
7505406 Public telephone control with voice over internet protocol transmission 22 2001
* Cited By Examiner