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Expired Canadian patentCanada

Sensor array

CA 1260729 A · Owner: Raychem Limited · Inventors: Atkinson, Edward B.; Dunbar, John H.

CIPO record

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

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Abstract From the Canadian patent

A sensor array usually a sensor matrix for sensing, pressure comprising a grid of conductors in a woven fabric, the row conductors (10) crossing over the column conductors (12) to form a matrix array of crossover points (15). The rows are separated from the columns by individually coating the conductors of one or both series with an electrically partially resistive fibrous material (14) so that when the conductors at any crossover point in the array are pressed closer together, the resistance between the two conductors at that crossover point decreases. By connecting the conductors to suitable electrical circuitry, the force applied at any crossover point and the location of that crossover …

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 3, 1985
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260729 A
Classification (IPC)G01L1/00 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedMay 3, 1985Patent grantedSep 26, 1989Term endedSep 26, 2006

Sources & verification

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