Patents on the invention of radio by Guilermo Marconi

First patents

• GB12,039 - Improvements in Transmitting Electrical impulses and Signals, and in Apparatus therefor by Guglielmo Marconi - Accepted, 2nd July 1897. This Marconi patent is the first description in print of a wireless telegraphy device (US586193; RE11913).

• US586193 - Transmitting electrical signals - July 13, 1897

• RE11913; GB12039

Other patents

• U.S. Patent 624516
• U.S. Patent 627650
• U.S. Patent 647007
• U.S. Patent 647008
• U.S. Patent 647009
• U.S. Patent 650109
• U.S. Patent 650110
• U.S. Patent 668315
• U.S. Patent 676332 -  Apparatus for wireless telegraphy (June 11, 1901)

This system was more advanced than Marconi's previous works by enabling tuning capabilities by the inclusion in the aerial circuits, at both the transmission and receiving stations, variable induction coils.

• U.S. Patent 763772

• British Patent No. 12.039 Improvements In Transmitting Electrical Impulses and Signals - july 2, 1897

• http://www.findingdulcinea.com/news/on-this-day/On-this-Day--Marconi-received-a-radio-signal-sent-from-across-the-Atlantic--revolutionizing-international-communications-.html
  
• http://home.online.no/~kgroenha/bondy.pdf
  
• http://earlyradiohistory.us/1901fa23.htm
  
• http://www.stonevintageradio.com/items.php?CA=2&UID=
  
• http://www.telegraph-office.com/tel_off-page.html
  
• http://www.sierrapapa.it/sp-rules.htm
  
• http://histel.com/z_histel/biografias.php?id_nombre=63
  
• http://www.electrotherapymuseum.com/museum_wireless2.html
  
• http://markpadfield.com/marconicalling/museum/html/events/events-i=80-s=0.html
  
• http://www.pressarchive.net/a.php?sName=Guglielmo_Marconi&nNewsStories=1
  
• http://www.patent-invent.com/radio_patents.html