Current meter
CA 2368901 A1 · Owner: Jodehl, Gerd · Inventors: Wollny, Heinz; Pniok, Thomas; Jodehl, Gerd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a current meter which is based on the principle of surface field measurement. Hall sensors (1) are used which are arranged in such a way, that they are excited by a magnetic field which is proportional to the current. Two Hall sensors are arranged in such a way that they detect the , field to be measured quantitatively in a uniform manner but with opposing , polarity signs. By subtracting the output signals from the Hall sensors the , measured value of the current is amplified whilst external parasitic , induction is eliminated.
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 January 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2022.
- 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.