Separating filter
CA 1187599 A · Owner: Sony Corporation · Inventors: Isobe, Toshinobu; Tanaka, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A separating filter is disclosed which includes, a band pass filter supplied with a composite color video signal, having a resonance frequency of a chrominance sub -carrier frequency, first circuit supplied with the output of the band pass filter, for generating first and second signals having the same phase but different time relationship, and second circuit for comparing levels of the first and second signals with a level of a reference signal and for producing one of both signals which has a level nearer to the reference level.
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 21, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 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.