Image Credits and Provenance

Every historical image used in the broadcast technology pioneers corpus, with its source, licence and required attribution.

We use only images under a verified free licence — public domain, CC0, CC BY or CC BY-SA. Where a licence requires attribution it is given here in full. We never use generated or hand-drawn depictions of real people.

If you believe an image is misattributed or wrongly licensed, please get in touch and we will remove it while we check.

11 images were supplied directly by the site owner and their licence has not yet been confirmed. They are listed below as such rather than carrying a licence tag we cannot verify. If you hold rights in any of them, please get in touch.

Profile	Type	Depicts	Licence	Attribution	Source
Alan Dower Blumlein	apparatus	The Blumlein wafeform - early British standard of video signal, proposed by A. D. Blumlein and enacted by the Television	pd-old-70	en:Alan Blumlein (29 June 1903 – 7 June 1942)	source
Alexander Graham Bell	portrait	Alexander Graham Bell	pd-us	Bain News Service	source
Alexander Stepanovich Popov	portrait	Alexander Stepanovich Popov	pd-old	Unknown author Unknown author	source
Alice Guy-Blaché	portrait	Alice Guy-Blaché	pd-old	Apeda Studio New York	source
Boris Rosing	portrait	Boris Rosing távolbalátó készüléke. Vasárnapi Ujság 1911. 28. szám illusztráció "Rosing távolbalátó-készülékénél az elek	pd-old	Boris Rosing	source
Bryce Bayer	portrait	Bryce Bayer	Site-supplied	—	Supplied by site owner
Charles Ginsburg	portrait	Charles Ginsburg	Site-supplied	—	Supplied by site owner
Charles Herrold	portrait	Charles Herrold	pd-us-expired	Magazine illustration	source
Charles K. Kao	portrait	Charles K. Kao	cc-by-sa-3.0	David Dobkin [1]	source
Clara Rockmore	portrait	Clara Rockmore	pd-us-not renewed	Renato Toppo	source
Claude Shannon	portrait	Claude Shannon	Site-supplied	—	Supplied by site owner
David A. Huffman	portrait	David A. Huffman	Site-supplied	—	Supplied by site owner
David Sarnoff	portrait	David Sarnoff	pd-harris-ewing	Harris & Ewing, photographer	source
Don Buchla	portrait	Don Buchla	pd-user-en	Captnapalm at English Wikipedia	source
Dorothy Nickerson	portrait	Dorothy Nickerson	pd-usgov	US Department of Agriculture	source
Eadweard Muybridge	apparatus	Eadweard Muybridge	pd-old-auto-expired	Eadweard Muybridge	source
Edwin Howard Armstrong	portrait	Edwin Howard Armstrong	pd-us-no notice	Unattributed.	source
Emile Berliner	portrait	Emile Berliner	pd-old	Georg Rothgiesser	source
Ernst Alexanderson	apparatus	Sujet : Prototypes Télévision -- États-Unis Radiodiffusion -- États-Unis États-Unis Référence bibliographique : Rol, 126	pd-france	Pacific and Atlantic (Agence photographique). Agence photographique pour le document reproduit (commanditaire) Agence Rol. Agence photographique (commanditaire)	source
Fritz Schröter	portrait	Fritz Schröter	cc-by-sa-3.0-de	Fischer	source
Georg Neumann	portrait	Georg Neumann	cc-by-sa-3.0-de	Magnussen, Friedrich (1914-1987)	source
George Eastman	portrait	George Eastman	pd-bain	Bain News Service, publisher	source
Gerhard Sessler	patent-drawing	United States patent 3118022 of first foil electret microphone (electroacoustic transducer), invented by G. M. Sessler a	pd-usgov	—	source
Grace Hopper	portrait	Grace Hopper	pd-usgov-military-navy	James S. Davis	source
Granville T. Woods	portrait	Granville T. Woods	pd-old-100	William J. Simmons	source
Guglielmo Marconi	portrait	Guglielmo Marconi	pd-anon-70-eu	Published on LIFE	source
Harvey Fletcher	portrait	Harvey Fletcher	Attribution	AIP Emilio Segrè Visual Archives	source
Hedy Lamarr	portrait	Hedy Lamarr	pd-anon-70-eu	Anonymous Unknown author	source
Heinrich Hertz	portrait	Heinrich Hertz	pd-old-70-expired	Robert Krewaldt	source
Hidetsugu Yagi	portrait	Hidetsugu Yagi	pd-japan-oldphoto	撮影者不明、電気之友社編	source
Homer Dudley	portrait	Homer Dudley	pd-us-expired	Photographer not named.	source
Jack Mullin	apparatus	Jack Mullin	cc-by-sa-2.0	Sameer Verma, San Francisco	source
Jacob Ziv	portrait	Jacob Ziv	pd-user-w	he:User:חישוביות	source
Jagadish Chandra Bose	portrait	Jagadish Chandra Bose	pd-old-70	Agence de presse Meurisse	source
James Edward Maceo West	portrait	James Edward Maceo West	pd-old-70-expired	Thomas Hodgetts	source
Jawed Karim	portrait	Jawed Karim	cc-by-sa-3.0	Composite image by user:Ianmacm , based on File:Chad Hurley -World Economic Forum Annual Meeting Davos 2007.jpg – World Economic Forum; File:YouTube TaiwanVersionLaunch SteveChen-1.jpg – Rico Shen;	source
John Logie Baird	portrait	John Logie Baird	pd-bain	Bain News Service, publisher	source
Karl Ferdinand Braun	portrait	Karl Ferdinand Braun	pd-bain	George Grantham Bain Collection	source
Karlheinz Brandenburg	portrait	Karlheinz Brandenburg	cc-by-sa-4.0	Steffen Prößdorf	source
Kenjiro Takayanagi	portrait	Kenjiro Takayanagi	pd-japan-oldphoto	朝日新聞社	source
Kálmán Tihanyi	patent-drawing	It is the 10th page of Kálmán Tihanyi's Radioskop patent in 1926	pd-old-auto	Kálmán Tihanyi (1897-1947)	source
Lee de Forest	portrait	Lee de Forest	pd-bain	Bain News Service, publisher	source
Leonard Troland	portrait	Leonard Troland	pd-us	Anonymous Unknown author	source
Leopold Godowsky Jr.	patent-drawing	Figure from patent US2113329A issued by Kodak, describing the structure of a chromogenic print.	pd-us-patent-no notice	Leopold D Mannes, Jr Leopold Godowsky	source
Leopold Mannes	portrait	Leopold Mannes	pd-us-expired	Unknown author Unknown author	source
Lou Ottens	portrait	Lou Ottens	cc-by-sa-4.0	Jordi Huisman	source
Louis Ducos du Hauron	portrait	Louis Ducos du Hauron	cc-zero	Rijksmuseum	source
Louis Le Prince	portrait	Louis Le Prince	pd-us-expired	Anonymous Unknown author	source
Louis Lumière	portrait	Louis Lumière	pd-old-70-expired	Unknown author Unknown author	source
Marie Van Brittan Brown	patent-drawing	US Patent US3482037A on a home security system utilizing television surveillance	pd-us-patent	Marie Van Brittan Brown	source
Natalie Kalmus	portrait	Natalie Kalmus	pd-because	Exhibitors Herald World, Inc., Chicago, Illinois	source
Nikola Tesla	portrait	Nikola Tesla	Site-supplied	—	Supplied by site owner
Otis Boykin	portrait	Otis Boykin	Site-supplied	—	Supplied by site owner
Paul Gottlieb Nipkow	portrait	Paul Gottlieb Nipkow	pd-old	Unknown author Unknown author	source
Peter Carl Goldmark	portrait	Peter Carl Goldmark	cc-zero	Unknown author Unknown author	source
Philipp Reis	portrait	Philipp Reis	pd-old	Unknown author Unknown author	source
Philo Taylor Farnsworth	portrait	Philo Taylor Farnsworth	pd-harris-ewing	Harris & Ewing	source
Radia Perlman	portrait	Radia Perlman	cc-zero	Scientist-100	source
Ray Dolby	patent-drawing	Ray Dolby (left) is inducted into the National Inventors Hall of Fame . NIHF president Rick Nydegger is center; United S	pd-usgov-doc	—	source
Reginald Fessenden	portrait	Reginald Fessenden	Site-supplied	—	Supplied by site owner
Rob Glaser	portrait	Rob Glaser	Site-supplied	—	Supplied by site owner
Robert Kahn	portrait	Robert Kahn	pd-usgov-nasa	Unknown author Unknown author	source
Robert Moog	portrait	Robert Moog	cc-by-2.0	evan p. cordes from I A M A H O B O, etats unis	source
Rudolf Fischer	portrait	Rudolf Fischer	pd-anon-70-eu	Unknown author Unknown author	source
Russell Kirsch	portrait	Russell Kirsch	cc-by-3.0	Joel Runyon	source
Sergei Prokudin-Gorsky	portrait	Sergei Prokudin-Gorsky	pd-old-auto-expired	Sergei Prokudin-Gorskii	source
Shintaro Uda	portrait	Shintaro Uda	pd-japan-oldphoto	共同通信社	source
Steven Sasson	portrait	Steven Sasson	Site-supplied	—	Supplied by site owner
Suzanne Ciani	portrait	Suzanne Ciani	cc-by-2.0	phil nunnally	source
Thomas Alva Edison	portrait	Thomas Alva Edison	pd-pcl-portraits	Unknown author Unknown author	source
Tim Berners-Lee	portrait	Tim Berners-Lee	Site-supplied	—	Supplied by site owner
Valdemar Poulsen	portrait	Valdemar Poulsen	pd-anon-1923	Unknown author Unknown author	source
Valerie Thomas	portrait	Valerie Thomas	pd-usgov-nasa	NASA	source
Vint Cerf	portrait	Vint Cerf	cc-by-3.0	Вени Марковски Veni Markovski	source
Vladimir Zworykin	portrait	Vladimir Zworykin	pd-old-100	Unknown author Unknown author	source
Wendy Carlos	portrait	Wendy Carlos	Site-supplied	—	Supplied by site owner
Willard Boyle	portrait	Willard Boyle	cc-by-sa-3.0	Prolineserver ( talk )	source
William Friese-Greene	portrait	William Friese-Greene	pd-old	—	source
William Kennedy Laurie Dickson	portrait	William Kennedy Laurie Dickson	pd-old-70-expired	William Kennedy Dickson	source
Édouard-Léon Scott de Martinville	portrait	Édouard-Léon Scott de Martinville	pd-old	Book: Jules Jamin, Edmond Bouty – Drawing: unknown	source
Étienne-Jules Marey	portrait	Étienne-Jules Marey	pd-france	Atelier Nadar. Photographe	source