Patent Yard Sign in
Expired Canadian patentCanada

Instrument with crossed-coil type movable magnet

CA 1293771 C · Owner: Araki, Fujio · Inventors: Noguchi, Masaki; Ohtani, Yoshihiro; Araki, Fujio

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

An instrument with a crossed-coil type of movable magnet performs a desired indication by converting a signal in accordance with the state of an object under measurement and applying a current corresponding to a digital value after A-D conversion to the crossed coils. The input signal that corresponds to the state of the object under measurement is overlapped with a ripple. This enables an improvement in the resolution of the indication of a pointer connected to the magnet.

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 December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 10, 1988
GrantedDecember 31, 1991
Term endedDecember 31, 2008
Patent numberCA 1293771 C
Classification (IPC)G01R5/16 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 10, 1988Patent grantedDec 31, 1991Term endedDec 31, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.