Patio door handle set Offset latch. 2265 sash controls stamped on back of plate
US Patent 5125703 D340.398
There are 2 types of the same Sash Controls handles. You must purchase the correct one.
Look at the interior handle on the door. Look at the 2 attaching screws and your thumb latch will be between them. If the thumb lact is closer to one of the screws you have what they call an OFFSET handle and all of the model numbers will start with 13-245.
If the thumblatch is dead center of the 2 attaching screws you have a CENTER latch handle. All the model numbers will start with 13-291.