A method for determining access time of repeatedly broadcast objects
CA 2272503 A1 · Owner: Sony International (Europe) Gmbh · Inventors: Zumkeller, Markus; Bittner, Rudolf; Schaefer, Ralf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Broadcast based information systems like Teletext use a unidirectional communication scheme in order to get access to information. This means that requests for data objects are not transmitted from a client to a server. Instead the, receiver part of the client has to listen for the requested object on the broadcast, medium and copy it to the local storage when it goes by. The access time from the, receiver point of view is defined as the difference between the reception point in time, of the object and the point in time when the request was made. Nowadays realized, broadcast based information systems are not able to determine precisely when a requested object will be available. The …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.