Local oscillation frequency synthesizer
CA 2110860 C · Owner: Nec Corporation · Inventors: Jokura, Jun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
First and second oscillation frequencies are supplied from first and second PLL synthesizers. First the first oscillation frequency is increased by a predetermined frequency amount corresponding to the change-over of channels, and is instantly decreased to the original frequency, while the second oscillation frequency is increased at a time behind the increase of the first oscillation frequency without the decrease thereof to the original frequency by the predetermined frequency amount, such that the lowest level in the vibration of the first oscillation signal is coincident at timing to the highest level of the second oscillation signal. The first and second oscillation signals thus …
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
- Filed December 7, 1993 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2015.
- 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.