Upright / grand / automatic piano: Gulbransen /Dickinson Co.: Hist. infos 1907-

Description

I offer a collection of
65
patents
of Gulbransen Company or Gulbransen - Dickinson Co. or of the founder Axel Gulbransen, published between 1907 and 1942 in the USA or Great Britain (all in english).
They are busy with various piano technique, like (player) grand piano, upright piano, automatic piano or parts of it.
All patents are complete, that means contain the full text and all drawings (see example). You will get a professional overview about the inventions of Gulbransen and the technical developments of his piano companies which you find nowhere in the world in this good quality / completeness.
Delivery is as a zipped file with a patent collection of pdf files (
not printed, not a book
).
You need only the wellknown free programme Acrobat Reader or a similar one to open the files. You can also print each file.
Copyright of the patent collection has only the seller!
Shipping:
You can download this patent collection after payment. I will send a link for downloading a zip-File of about 27 MB with the patent collection. After downloading please unzip the file. Then you will get a data directory with the pdf - patent files.
I will send the link for downloading not later then one day after payment via the ebay message system (please see your news at "My ebay"). Then you have 10 days time to download your patent collection of historical patents.