Radiotelephone system
CA 1048664 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Leeuwen, Johannes C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital radio transmission system including a master station and a plurality of slave stations in which the trans-, mit and receive periods of all the slave stations are under control of the master station. The duration and instants of occurrence of time frames are determined by a frame synchronizing pattern which is periodically transmitted by the master station on all channel frequencies of the system. The master station also transmits signalling code words for each channel frequency in fixed time slots within the frame duration as determined by successive frame synchronizing patterns.
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 February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- 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.