Infrared stereo speaker system
CA 1287373 C · Owner: Mlodzikowski, Allan G. · Inventors: Tsui, Yih-Pyng; Mlodzikowski, Allan G.; Ku, Hai-Pin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A stereophonic audio system including a device for providing a stereophonic signal, such as an audio receiver. An i infrared transmitter connected to the receiver converts the audio signal to an infrared signal to be radiated throughout a signal area. Within this signal area is disposed a pair of loudspeakers, each selecting a separate portion of the infrared signal, converting that one portion of the infrared signal to an audible sound signal, and radiating the sound throughout a listening area. Each loudspeaker includes a filter for selecting the one infrared signal which applies to it. The transmitter includes a plug engageable with a headphone jack of the …
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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
- 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.