Device for obtaining positional information
CA 2241506 A1 · Owner: Woodfield, David Alan · Inventors: Woodfield, David Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device (10) for obtaining information relating to the relative positions of first and second members (11, 12), the first member (11) comprising at least, three isolated electrically conducting pal-ts (13-16) and the second member, (12) being electrically conducting and adjacent to and capacitively coupled to the first member (11), the first and second members (11 12) being relatively, movable such that the proportions of each of the respective parts (13-16) of the, first member (11) in overlapping relationship with the second member (12) may be varied, oscillator means (25) to provide a first waveform signal (26) to one, of the parts (13-16) of the first member (11) and a second …
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 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 2020.
- 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.