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UID:a0aefca5-9309-4673-a4a6-a8916a96e61e
X-WR-CALDESC:On 11 July 1865\, the first US patent was granted for a cipher
  device to Signal Corps Sergeant Edwin H. Hawley\, for multiple alphabetic
  device which was a fan-like set of 26 wooden tablets\, each with a differ
 ent ciphertext alphabet on it\, designed for use with a keyword. <i>Info p
 er David Kahn's book\, 'The Codebreakers.'</i>
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DTSTART:20251102T020000
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RDATE:20271107T020000
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UID:c6e42b80-377b-4c79-9ce3-75bb7480674e
DTSTAMP:20260911T232213Z
DESCRIPTION:On 11 July 1865\, the first US patent was granted for a cipher 
 device to Signal Corps Sergeant Edwin H. Hawley\, for multiple alphabetic 
 device which was a fan-like set of 26 wooden tablets\, each with a differe
 nt ciphertext alphabet on it\, designed for use with a keyword. <i>Info pe
 r David Kahn's book\, 'The Codebreakers.'</i>
DTSTART;TZID=America/New_York:20260711T000000
DTEND;TZID=America/New_York:20260711T235900
LOCATION:
SUMMARY:1865: First US patent for cipher device to Edwin H. Hawley
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