Magnetic circuit for an yttrium-iron garnet crystal resonator for an oscillator
CA 1203585 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Doyen, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Magnetic circuit for an yttrium-iron garnet crystal resonator for an oscillator. Magnetic circuit for an yttrium-iron garnet crystal. Magnetic circuit for an yttrium-iron garnet crystal (11) resonator for an oscillator formed by a first, cylindrical pole piece (12) comprising a coil (13) provided around an axial core (14) and a second cylindrical pole piece (15) having a flat bottom (16), the yttrium-iron garnet crystal (11) being placed in a gap (17) defined by an end (18) of the axial core (14) and the part (19) of the flat bottom facing the said end (18). According to the invention, a circular groove (20) is arranged in the flat bottom (16) around the said part (19) facing the end (18) …
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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
- 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.