sliding glas door locking handle

A home owner from houston texas says:
the handle has the following patent information:
Canadian patent 919213 and 3596954; patented 1973
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Paul from SWISCO responded:
Patent numbers tend to cover a wide range of hardware, so they aren't the best method of identification. Start by looking at our 82-005 and see if this is a match. If not, I will need to see pictures of your hardware so that we can confirm the best replacement option.
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