US Patent No: 4,768,227

Number of patents in Portfolio can not be more than 2000

Coil operated telephone

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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, OK5

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dively, Lee V Tulsa, OK 3 75
Grubbs, Jack M Tulsa, OK 2 42

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Ceeco (1)
4,199,659 Electronic prepay adapter circuit for central office telephone equipment 6 1978
 
GENERAL TELEPHONE OF FLORIDA, A FLA CORP. (1)
4,538,028 Apparatus for use with key telephone system with wireless telephone device 16 1983
 
RATES TECHNOLOGY INC. (1)
4,198,545 Automatic call timing telephone apparatus 25 1978
 
SEISCOR TECHNOLOGIES, INC. (1)
4,698,840 Coin operated telephone 25 1985
 
Other [Check patent profile for assignment information] (2)
4,429,188 Telephone call screener 26 1981
4,439,636 Credit card actuated telecommunication access network 206 1982

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SECURUS TECHNOLOGIES, INC. (8)
5,319,702 Method and apparatus for detecting and responding to hook flash events occurring on a remote telephone 66 1992
5,805,685 Three way call detection by counting signal characteristics 59 1995
5,796,811 Three way call detection 41 1996
7,899,167 Centralized call processing 8 2003
8,000,269 Call processing with voice over internet protocol transmission 2 2004
7,916,845 Unauthorized call activity detection and prevention systems and methods for a Voice over Internet Protocol environment 0 2006
7,529,357 Inmate management and call processing systems and methods 23 2007
8,340,260 Inmate management and call processing systems and methods 0 2009
 
BELLSOUTH INTELLECTUAL PROPERTY CORPORATION (1)
6,320,946 Information payphone 32 1999
 
Digital Telecommunications Systems, Inc. (1)
4,947,422 Personalized telephone for automatic access to operator services 32 1989
 
INTELLICALL, INC. (1)
6,014,433 Dynamic escrow type detection system 0 1997
 
Nicolet Plastique Ltd. (1)
D314184 Combined wall plate and switches 10 1988
 
QUORTECH GLOBAL SOLUTIONS, INC. (1)
6,304,643 Pay phone deposit method for limiting overpayment by a customer 0 1999
 
SCIENCE DYNAMICS CORPORATION (1)
7,505,406 Public telephone control with voice over internet protocol transmission 12 2001
 
UNISYS CORPORATION (1)
5,535,264 Prompt issuing protocol for an intercept voice messaging system 17 1995
 
WINBOND ELECTRONICS CORP. (1)
5,987,120 Device for identifying line reversal/ringing signal of a telephone set 3 1997
 
Other [Check patent profile for assignment information] (1)
6,335,970 Automatic coin collection device for a payphone provided with no coin collection signal 0 1999

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