Method of and device for recording data signals on a record carrier of an inscribable type and device for reading such a record carrier
CA 2013052 C · Owner: Van Der Zande, Paulus Christianus Maria · Inventors: Van Der Zande, Paulus Christianus Maria; Roth, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When a series of data signals (DS1, DS2 DS3), are recorded in a track (82) of a record carrier (61) the address information indicating the location where the data signal is recorded on the record carrier is stared in a temporary table of contents (PMA) after recording of a data signal. After the last data signal of the series has been recorded a definitive table of contents is generated by means of the temporary table of contents which definitive, table of contents is subsequently recorded in the lead-in track (LI) on the record carrier. The Application also discloses a read device for reading a record carrier thus obtained.
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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 March 26, 1990 and granted October 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2012.
- 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
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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.