All US patents and many foreign patents are available on the Internet.

What I found: HARP Patent No US1010816 A

  https://www.google.com/patents/US1010816?dq=Wurlitzer+Harp&hl=en&sa=X&ei=MrUtVIalAYqryASi84GoBQ&ved=0CB4Q6wEwAA 

This is not an automatic playing harp.  For a comprehensive list of all
patents, see the list at:

Wurlitzer Harp

  https://www.google.com/?tbm=pts&hl=en&gws_rd=ssl#hl=en&tbm=pts&q=Wurlitzer+Harp 

Regards,
Don Shenbarger