Henry Green applied for a patent on vacuum tubes

12/21/1912 |

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Henry Green applied for a patent on improvements in vacuum-tubes.

The past recalled

Green applied for a patent on x-ray tubes on July 12, 1912.

The future foretold

Green received this patent, No. 1,068,426, on July 29, 1913.
Green will die on March 4, 1914.

Sources

United States Patent Office, "Vacuum Tube," Patent No. 1,068,426, July 29, 1913.

History

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