Wax nostalgic about and learn from the history of early electronics. See articles from Popular Electronics , published October - April All copyrights are hereby acknowledged. A lot of innovation went into perfecting telegraph keys.
Like many successful products, the Vibroplex inspired others to manufacture unauthorized copies. Coffe of Cleveland, Ohio, had filed a patent for a mechanical sending machine on January 11th, , four months before Martin filed for his patent. In Coffe and a partner formed the Mecograph Company and began making bugs. Coffe sued Martin for patent infringement, and in actually won the case.
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Here you find radio manufacturers from the selected country. Click a manufacturer to see its radio models in ONE list. See here the new table with more content! Because of external links we have to leave this old table here.