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Old, vintage microphone: Philips / RCA / Marconi.. Infos / history 1897 - 1975 For Sale
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Old, vintage microphone: Philips / RCA / Marconi.. Infos / history 1897 - 1975:
$16.50
Ioffer alarge collection ofmore than 1100 (!!!)old patents from USA and Great Britain (all in english) aroundmicrophones(also parts, circuit technologyand accessories of microphones)between 1897 and 1975. All patents are complete, that means contain the full text and all (often beautiful andvery informative - see example)drawings. The inventors come mostly from USA / GBbut also from other contries in the world.You will find materialfromTelefunken, Philips, Marconi, RCA,General Electric, RCA,General, Bell, Maico, Dictaphone anda lotmore. The patent collection - made by the seller - is the world best patent overview over this long time periode! Delivery is as pdf file collectionon a CD(not printed!). Each file contains one complete patent. Also included is an Excel list with most of patent titles, datas of issueand often also inventors/owners of patents.The list is linked directly to the patent files so that each patent will be open easily if you click on the link. To open this Excel file you can use Excel, Excel viewer or any other common open office programme. Of course you can open each patent file also direct without using of the Excel table!! Copyright of the CD has only the seller! Shipping worldwide as airmail letter.You can also buy more patent collections - the shipping price will not increase!
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