Public address apparatus
CA 1078059 A · Owner: Rodriguez, Jesus · Inventors: Rodriguez, Jesus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This disclosure pertains to a public address apparatus comprising a portable dual track tape recorder - playback unit having individual stationary electromagnetic dual purpose recording and playback heads feeding selectively independently the input of a single channel audio amplifier and speaker system. The audio amplifier is provided with two additional output terminals, each of which is independently capable of providing recording currents to each recording head as desired. Additional inputs are provided accommodating microphones and radio receivers.
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 May 20, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 1997.
- 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.