2314471
2510046
2787669
2868447
2974188
3073906
3079589
3133268
3181123
3263027
More ...
3275746
3299210
3333198
3344401
3352966
3405457
3408749
3435421
3441140
3500336
3502812
3504447
3519744
3526709
3534161
3567848
3573377
3584142
3587053
3588834
3612767
3617637
3618035
3636265
3654708
3660599
3678207
3684833
3691295
3692938
3705269
3711648
3718770
3725587
3729581
3757225
3766324
3775563
3781477
3798610
3806649
3806658
3816662
3822363
3843835
3873771
3917904
3922491
Control circuit for subscriber station in video telephone system
Patent #: 3933233
Issued on: 01/20/1976
Inventor: Randmere , et al.
Videotelephone system with centralized synchronization control
Patent #: 3939306
Issued on: 02/17/1976
Inventor: Mosca
Video-telephone system initially signifies caller to called subscriber
Patent #: 3946158
Issued on: 03/23/1976
Inventor: Leclercq , et al.
Transmission of video pictures at audio frequencies
Patent #: 3974329
Issued on: 08/10/1976
Inventor: Zenzefilis
FM television telephone system
Patent #: 3974337
Issued on: 08/10/1976
Inventor: Tatsuzawa
Apparatus utilizing a phantom circuit for connecting additional subscribers to a telecommunication system
Patent #: 3975594
Issued on: 08/17/1976
Inventor: Guntersdorfer
Video conferencing system using spatial reduction and temporal resolution
Patent #: 4004084
Issued on: 01/18/1977
Inventor: Brown , et al.
Picture phone
Patent #: 4015115
Issued on: 03/29/1977
Inventor: Corcoran
Mix/effects switch arrangement and mix/effects switching system
Patent #: 4028727
Issued on: 06/07/1977
Inventor: Skrydstrup
Videotelephone conference system
Patent #: 4054908
Issued on: 10/18/1977
Inventor: Poirier , et al.
Interactive video/telephone transmission system
Patent #: 4071697
Issued on: 01/31/1978
Inventor: Bushnell , et al.
Video composite transmission system integrating encoded data channels into blanking and synchronizing signal
Patent #: 4191969
Issued on: 03/04/1980
Inventor: Briand , et al.
Video telephone apparatus
Patent #: 4232196
Issued on: 11/04/1980
Inventor: Filippi
Electronic apparatus for the display of information received over a line
Patent #: 4289930
Issued on: 09/15/1981
Inventor: Connolly , et al.
Processor circuit for video data terminal
Patent #: 4328557
Issued on: 05/04/1982
Inventor: Gastinel
Television receiver with two-way telephone conversation and dial-out capabilities
Patent #: 4349701
Issued on: 09/14/1982
Inventor: Snopko
Microcomputer-controlled television/telephone system and method therefore
Patent #: 4356509
Issued on: 10/26/1982
Inventor: Skerlos , et al.
Method and means for interactive audio and video conferencing
Patent #: 4360827
Issued on: 11/23/1982
Inventor: Braun
Subscriber station for providing multiple services to a subscriber
Patent #: 4367548
Issued on: 01/04/1983
Inventor: Cotten, Jr. , et al.
Combined wired broadcasting and viewphone system
Patent #: 4386365
Issued on: 05/31/1983
Inventor: Gargini
Conversational video system
Patent #: 4388489
Issued on: 06/14/1983
Inventor: Wigan , et al.
Bidirectional information transmission via a long distance video interface (LDVI) cable
Patent #: 4390900
Issued on: 06/28/1983
Inventor: Van Kampen , et al.
Cable television transmission control system
Patent #: 4418424
Issued on: 11/29/1983
Inventor: Kawamoto , et al.
System for overlaying a computer generated video signal on an NTSC video signal
Patent #: 4425581
Issued on: 01/10/1984
Inventor: Schweppe , et al.
Apparatus and method for storing and interrelating visual data and computer information
Patent #: 4425586
Issued on: 01/10/1984
Inventor: Miller
Simultaneous transmission of two information signals within a band-limited communications channel
Patent #: 4425642
Issued on: 01/10/1984
Inventor: Moses , et al.
Service integrated communication transmission and interchange system
Patent #: 4441180
Issued on: 04/03/1984
Inventor: Schussler
Viewdata system and apparatus
Patent #: 4451701
Issued on: 05/29/1984
Inventor: Bendig
Television/telephone system with automatic dialing
Patent #: 4456925
Issued on: 06/26/1984
Inventor: Skerlos , et al.
Data conference system
Patent #: 4479195
Issued on: 10/23/1984
Inventor: Herr , et al.
Multilocation video conference terminal including rapid video switching Patent #: 4574374
Issued on: 03/04/1986
Inventor: Scordo
April 6, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
