- Martin, Horace G. - http://www.telegraph-history.org/horace-g-martin/
Created a semi-automatic key to help prevent the development of telegrapher paralysis, created by the daily abuse of manipulating a manual machine key. Page includes history of the man and the spread of this invention across the United States.
- Pioneers of The Machine Tool Industry - http://www.pioneers.historians.co.uk/
Features backgrounds of early entrepreneurs from early Egyptians, Leonardo da Vinci to modern United Kingdom personalities, such as Alfred Herbert and Axel Wickman.
- Denk, Robert - http://www.benduhn.homepage.t-online.de/denk/summary.html
The inventor of the tubeless radio used an unknown solid-state effect, which was never rediscovered.
- Ephraimshay.com - http://www.ephraimshay.com/
Features transcriptions of diary entries that pertain to the making of his invention, the Shay locamotive engine. Page includes related resource links.
- Grigori T. Rudenko - http://www.eccentrix.com/members/rudenko/
Russian inventor of the mechanical artificial hand prosthesis. Page gives background of this war veteran and patent document photos.
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