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Invention Room details Viewed: 405 times.
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Dynamic Accentor Viewed: 367 times.
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1-Aug-1956 article on Dynamic Accentor Viewed: 323 times.
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1912 Hammond was a US Delegate to the Int'l Telegraphic Conf in London Viewed: 345 times.
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Alexander Graham Bell and John Hays Hammond Jr. Viewed: 350 times.
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Castle lobby area was lab and business office Viewed: 351 times.
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Dr. Hammond at his office desk Viewed: 348 times.
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Hammond on the stairs in the Great Hall Viewed: 333 times.
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Hammond watching his pipe organ being manufactured Viewed: 348 times.
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