Community antenna arrangement
CA 1194214 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Groenewegen, Willem F.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
19, ABSTRACT:, Community antenna arrangement I - III for a frequency-division multiplex transmission of at least four television signals, comprising a frequency-conversion arrangement (C1-Cj, ?1 - ?k) connected to a distribution network (II, III) for converting the channel frequency distribution of the television signals from an input channel pattern to an output channel pattern in which output channel pattern the picture carriers of the television signals succeed each other with frequency spacings of which not more than two consecutive frequency carrier distances in the second output channel pattern to be equal to an integer of a certain frequency interval the higher order intermodulation …
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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 September 24, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 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.