Resources Contact Us Home
Wireless prepaid telephone system with extended capability

Image Number 8 for United States Patent #6754481.

A telecommunication system incorporates individual station instruments simplified by wireless operation, voice dialing, prepaid accounting and out-call operation, all enabled by cooperative system operation including supporting central equipment. Wireless operation of the central equipment involves a multiple port wireless platform along with other units for interfacing a multitude of mobile station instruments simultaneously for interactive audio communication to, regulate control, monitor and record operations of the instruments, and bridge communication with selected remote terminals through the public switched telephone network. Message capability, emergency abort to an operator station and security features supplement the basic system.

  Recently Added Patents
Nanoparticle entrapment of materials
Conductor-mixed active electrode material, electrode structure, rechargeable battery, and manufacturing method of conductor-mixed active electrode material
Combined high and low frequency stimulation therapy
Electrophoretic element and display device
Agents for preventing and treating disorders involving modulation of the ryanodine receptors
PCSK9 antagonists
  Randomly Featured Patents
Electronic device and controlling method thereof
Wide-input windowed nonlinear analog-to-digital converter for high-frequency digitally controlled SMPS
Video slot machine
Centrifugal drying mill
Field effect transistor with raised source/drain fin straps
Integrated container for meat products
Ring insert kit for scissors and template for use therewith
Apparatus and method for positionally stabilizing an image
Environmental control system including ozone-destroying catalytic converter having anodized and washcoat layers
Gripping device of working machine and working machine with the same