Aeroporto Guglielmo Marconi di Bologna S.p.A. (AdB) is the operator of Bologna Guglielmo Marconi Airport, The company is listed in Borsa Italiana (Milan Stock Exchange).
The Marconi Wireless Telegraph Company of America (commonly called American Marconi) was incorporated in 1899.
 It was established as a subsidiary of the British Marconi Company and held the U.S. and Cuban rights to Guglielmo Marconi's radio (then called "wireless telegraphy") patents.
 American Marconi initially primarily operated high-powered land and translatlantic shipboard stations.
 In 1912, it acquired the extensive assets of the bankrupt United Wireless Telegraph Company, becoming the dominant radio communications provider in the United States.
Guglielmo Marconi, 1st Marquis of Marconi ( ; ] ; 25 April 187420 July 1937) was an Italian inventor and electrical engineer known for his pioneering work on long-distance radio transmission and for his development of Marconi's law and a radio telegraph system.
 He is usually credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".
The Marconi National Historic Site and the Marconi Wireless Station National Historic Site are two National Historic Sites of Canada located on Cape Breton Island, Nova Scotia, Canada.
 Both sites commemorate the efforts of Guglielmo Marconi to transmit transatlantic radio signals between North America and Europe in the first decade of the 20th century.
 The two sites are located within approximately 8 km of one another, and are connected by the Marconi Trail.
Guglielmo Marconi is a public artwork by Attilio Piccirilli, located at the intersection of 16th and Lamont Streets, N.W., in the Mount Pleasant neighborhood of Washington, D.C., United States.
 It stands as a tribute to Italian inventor Guglielmo Marconi.
 It was paid for by public subscription and erected in 1941.
 The artwork was listed on both the District of Columbia Inventory of Historic Sites and the National Register of Historic Places in 2007.
 It is a contributing property in the Mount Pleasant Historic District.
 The monument was originally surveyed as part of the Smithsonian's Save Outdoor Sculpture!
 survey in 1994.
SS "Guglielmo Marconi" was an Italian ocean liner launched on 24 September 1961 for Lloyd Triestino's Genoa—Sydney service.
 Her sister ship was  .
 "Guglielmo Marconi" left Genoa on her maiden voyage on November 18th 1963.
 In 1976, Guglielmo Marconi was transferred to the Naples-Brazil-River Plate service of Italia Line.
Bologna Guglielmo Marconi Airport (Italian: "Aeroporto di Bologna-Guglielmo Marconi" ) (IATA: BLQ, ICAO: LIPE) is an international airport serving the city of Bologna in Italy.
 It is approximately 6 km northwest of the town center in the Emilia-Romagna region of Italy, about 200 km south-east of Milan.
 The airport is named after Bologna native Guglielmo Marconi, an Italian electrical engineer and Nobel laureate.
 With 7,680,992 passengers handled in 2016, it is now the 7th busiest in Italy.
The Guglielmo Marconi International Fellowship Foundation, briefly called Marconi Foundation and currently known as The Marconi Society, was established by Gioia Marconi Braga in 1974 to commemorate the centennial of the birth (April 24, 1874) of her father Guglielmo Marconi.
 The Marconi International Fellowship Council was established to honor significant contributions in science and technology, awarding the Marconi Prize and an annual $100,000 grant to a living scientist who has made advances in communication technology that benefits mankind.
Karl Ferdinand Braun (6 June 1850 – 20 April 1918) was a German inventor, physicist and Nobel laureate in physics.
 Braun contributed significantly to the development of radio and television technology: he shared with Guglielmo Marconi the 1909 Nobel Prize in Physics.
The Museum and Mausoleum of Guglielmo Marconi is a museum and burial structure for the Italian scientist, inventor, and engineer, Guglielmo Marconi.
 The tomb is located adjacent to the 17th-century Villa Griffone/Villa Marconi, located on via Celestini #1 in Pontecchio Marconi, about 15 kilometers outside the city of Bologna in Emilia Romagna, Italy.

Question: how is Guglielmo Marconi and Karl Ferdinand Braun connected?
Answer: inventor