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Expired Canadian patentCanada

Wideband frequency signal digitizer and method

CA 2181807 C · Owner: Motorola, Inc. · Inventors: Elder, Robert C.

CIPO record

Overview

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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 wideband frequency digitizer (10) and method for digitizing multiple bands of a wideband frequency signal. The digitizer (10) and method providing for optimally positioning a segment (402) of the wideband frequency signal within a Nyquist band of an analog-to-digital converter (36). Remaining segments (402) of the wideband frequency signal are closely positioned relative to the first segment such that the entire wideband frequency signal (400) is easily digitized using a single or multiple analog-to-digital converters (36) while reducing or eliminating undesirable spurious signals.

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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

  • Filed November 22, 1995 and granted September 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 22, 1995
GrantedSeptember 28, 1999
Term endedNovember 22, 2015
Patent numberCA 2181807 C
Classification (IPC)H03D7/00 +2 more

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedNov 22, 1995Patent grantedSep 28, 1999Term endedNov 22, 2015

Sources & verification

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