• Documents : copies of patents
  • Institution ( depout ) : U.S. Patent Office
  • Inventors : G. Marconi, Lee de Forest, Graham Bell, Samuel Morse 
  • Patented : - G. Marconi - Inventor of radio - 1897 ( 11 sheets )
                            - Lee De Forest - Inventor of  vacuum tube ( triode ) amlifying - 1907 ( 4 sheets )

                            - Graham Bell - Inventor of telephone - 1876 ( 6 sheets )

                            - Samuel Morse - Inventor of Morse code - 1840
  • Global estimation (1-10) : 9
  • Specials : all patents has been printed on Art antiqued Parchment Paper and put into
         properly maps
  • Note : -

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