Mortise Latch

A quick learner from Chicago says:
Hello! I need a mortise latch as a replacement for a sliding door handle with a Canada patent number: 3596945. Is 82-211 the correct part?
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Tom from SWISCO responded:
I'm afraid I can't match your mortise lock with just the patent number. Patent numbers usually cover a wide range of hardware and aren't meant to be used for identification. If you can, show me a picture of the mortise lock you have now and we will do our best to find a match.
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