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Transactional telecommunication system

  • US 4,645,873 A
  • Filed: 01/23/1985
  • Issued: 02/24/1987
  • Est. Priority Date: 01/23/1985
  • Status: Expired due to Fees
First Claim
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1. A transactional system serving subscribers in a plurality of localities, comprising a national data base havinga plurality of groups of addressed segments of data storage, each group storing data pertaining to an associated one of said localities, each group being addressable by a locality number,a plurality of access-number addressed segments of data storage, each assigned to one of said subscribers and storing a locality number for said one of said subscribers,means for linking said access-number addressed segments of data storage to said groups of locality number addressed segments of data storage, so that locality data stored in the group of locality number addressed segments of data storage associated with a subscriber'"'"'s locality number is automatically addressed upon receipt of said subscriber'"'"'s access number,wherein at least one of said localities comprises a plurality of sub-localities,wherein each of said locality numbers has a predetermined number of digits signifying said localities, and at least one additional digit for identifying respective sub-localities,wherein said locality numbers are zip code numbers,wherein said groups of addressed segments of data storage comprise classified ad sections, each having a respective number of ads stored therein,wherein said linking means comprisesmeans for retrieving a subscriber zip code from said access number addressed segments of data storage in response to entry of said subscriber'"'"'s access number,means for addressing groups of data storage segments using the retrieved zip code number and for counting the number of ads in any locality number addressed segments of data storage corresponding to localities having the same first 3 digits as said retrieved zip code, andmeans for transmitting to a subscriber controlled data access means the so counted ads, if said number of ads is less than a predetermined maximum ad number, or transmitting only sub-locality ads in locality number addressed segments of data storage having zip codes having the same first 4 digits as said retrieved zip code, if the so counted number of ads exceeds said predetermined maximum number;

  • andsaid subscriber-controlled data access means comprising a plurality of subscriber units, each having a locality number corresponding to a geographic location thereof, each subscriber having an access number,means for transmitting said access number to said national data base,display means for displaying locality data received from said national data base, andmeans for said national data base to receive and process said access-numbers.

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