Surface acoustic wave devices
CA 1106003 A · Owner: The Secretary Of State For Defence In Her Britannic Majesty'S Government Of The United Kingdom Of Great Britain And Northern Ireland · Inventors: Paige, Edward G.S.; Newton, Cleland O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention disclosed relates to a device for generating signals whose frequency varies with time. The device includes means for impulsing the inputs of the two delay lines with a variable relative time delay between the impulsing of the two delay line inputs and a mixer for mixing together, the outputs of the two delay lines. Also described is a variable dispersion filter for use in conjunction with the signal generating device. The filter comprises the generator described above wherein the output of one said delay, line is connected to said mixer via a further mixer said further mixer addi-, tionally having an input signal connection.
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 July 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 1998.
- 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.