Method and system for coupling optical fibres without fresnel reflection and variable optical attenuator and system using said attenuator to determine the effect of the reflectioncoefficient on an optical line

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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 May 10, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2011.
• We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.