US3699264 Conference Circuit For Pulse Code Modulated Telephony.jpg
US3706855 S Generator For Digital Pulse Signals Representative Of Analog Ignal Pairs.jpg
US3710028 Detector For Digitally Transmitted Multi frequency Tones As Utilized For Signaling In A Pulse Code Modulated Telephone System.jpg
US3750111 Modular Digital Detector Circuit Arrangement.jpg
US3760371 Asynchronous Data Transmission Over A Pulse Code Modulation Carrier.jpg
US3808368 Slaved PCM Clock Circuit.jpg
US3825683 Line Variation Compensation System For Synchronized PCM Digital Switching.jpg
US3839599 Line Variation Compensation System For Synchronized PCM Digital Switching.jpg
US3890469 Time division switching system.jpg
US3920921 Line equipment for scan and control system for synchronized PCM digital switching exchange.jpg
US3959588 Digital line synchronizer.jpg
US3997874 Time divided switching and concentration apparatus.jpg
US3999050 Electronic diary.jpg
US4022991 Conferencing arrangement for use in a PCM system.jpg
US4031328 Conferencing arrangement for use in a PCM system.jpg
US4146749 Telecommunications network having multi-function spare network block.jpg
US4149038 Method and apparatus for fault detection in PCM multiplexed system.jpg
US4154988 Method and means for accessing program memory of a common control telecommunications switching system.jpg
US4205203 Methods and apparatus for digitally signaling sounds and tones in a PCM multiplex system.jpg
US4218589 Method and apparatus for testing tone generators.jpg
US4256926 Microprocessor control complex for a telecommunication switching system.jpg
EP0766852B1-2.jpg
US4257119 PCM switching system for wide and narrow band signals.jpg
US4266292 Method and apparatus for testing analog-to-digital and digital-to-analog code converters.jpg
US4289934 Integrated automatic call distribution facility and PBX system.jpg
US4432105 Shower device.jpg
US4585145 Tape dispenser.jpg
US4613730 Electronic telephone with feature access and speed dialing including loop breaks.jpg
US4627047 Integrated voice and data telecommunication switching system.jpg
US5349638 Universal calling:originating number identification.jpg
US5590038 Universal electronic transaction card including receipt storage and system and methods of conducting electronic transactions.jpg
US5884271 Device, system and methods of conducting paperless transactions.jpg
US6705520 Point of sale adapter for electronic transaction device.jpg
US6769607 Point of sale and display adapter for electronic transaction device.jpg
US6925439 Device, system and methods of conducting paperless transactions.jpg
US7308426 System and methods for servicing electronic transactions.jpg
US7366990 Method and system for managing user activities and information using a customized computer interface.jpg
US7529563 System for distribution and use of virtual stored value cards.jpg
US8239324.jpg
US8429046 System and methods for servicing electronic transactions.jpg
US8527380 System and methods for servicing electronic transactions.jpg
US8595132 System and methods for servicing electronic transactions.jpg
US20050247777.jpg
US20080222036.jpg
US20120109672.jpg
US20120109673.jpg
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