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MAJOR GENERAL JOSEPH O. MAUBORGNE - AUTOGRAPHED SIGNED CHECK 07/19/1922 CO-SIGNED BY: KATHARINE P. (HALE) MAUBORGNE - HFSID 317461

GENERAL JOSEPH O. MAUBORGNE The future Chief Signal Officer signs a $25 check to his wife. Check signed: "J. O. Mauborgne", 6½x2¾. Washington, D.C., 1922 July 19. Check #6, drawn on the Riggs National Bank, payable to "Katharine P. Mauborgne." for $25. Entirely filled out by Mauborgne.

Sale Price $272.00

Reg. $320.00

Condition: See item description
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GENERAL JOSEPH O. MAUBORGNE
The future Chief Signal Officer signs a $25 check to his wife.
Check signed: "J. O. Mauborgne", 6½x2¾. Washington, D.C., 1922 July 19. Check #6, drawn on the Riggs National Bank, payable to "Katharine P. Mauborgne." for $25. Entirely filled out by Mauborgne. Joseph Oswald Mauborgne (1881-1971) joined the US Army in 1903, and attended the Army Signal School at Fort Leavenworth (1909-1910). In 1912, Mauborgne installed the first radio on an airplane, with which future Air Force commander Henry "Hap" Arnold sent the first radio message from the air to Mauborgne on the ground. Two years later, Mauborgne, this time aloft, conducted the first two-way radio communication with a ground station (December 16, 1914). That same year, he found a solution to the Playfair cypher (a substitution cypher using a pair of letters, not just one). In 1919, Mauborgne and Gilbert Vernon of Bell Laboratories invented the one-time pad, a code technique which still cannot be broken if used properly. As Chief of Signal (1939-1941), Mauborgne pressed the first mass production of radar. He retired on September 30, 1941, less than 6 weeks before Pearl Harbor. He is enshrined in the Military Intelligence Hall of Fame. Mauborgne married Katharine Hale Poore in December 1907. The couple had two sons. Perforation marks at top right corner. Creased fold folds. Lightly toned. Otherwise fine condition.

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