×

Secure remote control system with receiver controlled to add and delete identity codes

  • US 5,473,318 A
  • Filed: 01/10/1992
  • Issued: 12/05/1995
  • Est. Priority Date: 01/10/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. An automatic door receiver system for use with a door in an opening to a limited access parking space having an opened and a closed position, said automatic door receiver system comprisinga receiver unit for receiving radio frequency signals;

  • a nonvolatile read/write identity code memory having stored therein a plurality of authorized identity codes;

    a receiver controller connected to said receiver unit and said read/write identity code memory fordemodulating any identity code modulated on said radio frequency signals, andgenerating an open door signal whenever a demodulated identity code corresponds to an authorized identity code; and

    a memory controller connected to said read/write identity code memory for control of said authorized identity codes stored in said read/write identity code memory, and having means for writing identity codes into selected memory locations and for deleting identity codes by overwriting the corresponding memory location with a predetermined unauthorized identity code.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×