There isnt a serial number,usually just the model number you
see.
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The address of the Patrick Ranch Museum is: 10381 Midway, Chico,
CA 95928
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download the codes and the manual for free here
http://www.replacementremotes.com/store/productdetailp.cfm?productid=61355
Go to: http://www.lexrixa.com/remote-control.htm This List the
codes and the Manual at no charge.