Subscription card for a videotex receiver
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 28, 1982
Grant Date -
N/A
app pub date -
Jan 23, 1980
filing date -
Feb 6, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A subscription card for videotex receivers, comprising: (a) a support, (b) means for processing the information, comprising in particular a control unit governing an arithmetical and logical unit and a live memory, (c) an interface permitting exchanges between the card and the apparatus in which it is inserted (charging station or receiver), further comprising: (d) a programmable memory comprising a plurality of locations for receiving numerical subscription blocks C.sub.i, (e) a dead memory containing instructions for proceeding with the recording and selection of said subscription blocks, and for carrying out a calculation, (f) a calculation circuit receiving, from the receiver in which the card is inserted, numerical messages M.sub.i and receiving from said programmable memory a numerical subscription block C.sub.i, this circuit being adapted to work out an algorithm whose parameters are provided by the subscribers' keys C.sub.i on instructions obtained from the second dead memory and delivering, after the calculation, a numerical signal representing an operating key K.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully