Circuit for the compensation of the horizontal component of the earth's magnetic field for a colour picture tube of a high-resolution monitor
CA 2043934 C · Owner: Koninklijke Philips Electronics N.V. · Inventors: Negretti, Carlo; Lonoce, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The circuit comprises a probe (6) for detecting a horizontal magnetic field and first and second circuit means (15 17) driven by said , probe, (6) so as to create respective axial and lateral components of compensation of the, horizontal magnetic field, that are of equal direction and intensity but of, opposite sign to that of the magnetic field under test.
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 June 5, 1991 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2013.
- 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.