One product we sell a lot of are overhead door holders and stops.   Many people in commercial and residential applications have doors they would like to lock in the open position.  But due to the location or bottom of door clearance on patio doors, a regular kick down door stop will not work.   My solution for this is to use the Overhead Door Holder shown on this page.   I have some installed on by house and we just love the fresh air that it allows into our house.