×

Multi-level hierarchial radio-frequency system communication system

  • US 6,749,122 B1
  • Filed: 12/20/1999
  • Issued: 06/15/2004
  • Est. Priority Date: 05/25/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. A data communication system comprising:

  • a local area network adapted to communicate over a first wireless communication channel;

    a battery-powered mobile communication device sized to be carried by a user and adapted to transmit and receive data over the first wireless communication channel and to transmit and receive data over a second wireless communication channel; and

    a controller arranged to communicate over the first wireless communication channel to manage communication over the local area network.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×