Disc player
CA 1182913 A · Owner: Sony Corporation · Inventors: Nonaka, Chiaki; Ohtawa, Masanori; Hamada, Yuichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for reproducing a recording medium of a disc-shape on which an audio information is recorded as a spiral or coaxial tracks is disclosed. The apparatus includes a pick-up device for reproducing the audio information from the recording medium, a driver for rotating the recording medium relative to the pick-up device a tracking, device for causing the pick-up device to trace the track of the recording medium, and a transporting device for moving the pick-up device in a direction across the track. In this case the apparatus is characterized by a controller for controlling the pick-up device so as to trace the tracks intermittently which are apart from each other by a predetermined …
Read the whole patent
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
- Granted February 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2002.
- 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.