I offer a collection of 46 historical patents from wellknown company Telefunken, published between 1928 and 1966.
They are from USA or Great Britain (all in english).
The patents are busy in most cases with various inventions connected with loudspeaker technique (loudspeaker system, diaphragm, electroacoustic megaphone).
All patents are complete, that means contain the full text and all drawings (see example).
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 d o w n l o a d this patent collection after payment from an internet source. I will send the text of the link for d o w n l o a d i n g a zip-File of about 13 MB with the patent collection as message to the buyer via the ebay system. Please have a look at your messages in the "My ebay" modus or see your emails in your ebay email account, where the message to the buyer should also arrives. After d o w n l o a d i n g please unzip the file. Then you will get a data directory with the pdf - patent files. I will send the link not later than one day after payment. Then you have 10 days time to d o w n l o a d your patent collection of historical patents.