Stereo expansion circuit selection switch
CA 1304005 C · Owner: Anderson, Mark Robert · Inventors: Morris, Robert Edward, Jr.; Anderson, Mark Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
RCA 85,025, ABSTRACT -, A stereo expansion circuit has right and left amplifying channels with the right and left channels each having a first input terminal for providing unexpanded stereo signals. Each of said channels also has a second input terminal. A selection device comprises switch means cross coupling the second input terminals for providing expanded stereo when the switch means is closed.
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 June 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 2009.
- 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.