Bilder Videos

David Edward Hughes Bilder ❘ Science Photo Library

Carbon microphone, invented in 1878 by David Edward Hughes
12915954 - Carbon microphone, invented in 1878 by David Edward Hughes
David Edward Hughes, Welsh-American Inventor
12626892 - David Edward Hughes, Welsh-American Inventor
David Edward Hughes, Welsh-American inventor
13501834 - David Edward Hughes, Welsh-American inventor
David Edward Hugues, Welsh-US inventor
12290060 - David Edward Hugues, Welsh-US inventor
David Hughes,US inventor
11674689 - David Hughes,US inventor
David E. Hughes,US inventor
11829195 - David E. Hughes,US inventor
David Hughes,US inventor
11708799 - David Hughes,US inventor
Hughes electric printing telegraph, 19th century illustration
14084197 - Hughes electric printing telegraph, 19th century illustration
Hughes' carbon microphone,19th century
11593336 - Hughes' carbon microphone,19th century
Carbon microphone, 19th century illustration
13416696 - Carbon microphone, 19th century illustration
Carbon microphone, 1882
12902992 - Carbon microphone, 1882
Combined printer-telegraph,1860
11672838 - Combined printer-telegraph,1860
Carbon microphone
11721615 - Carbon microphone
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