BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//archive.cryptologicfoundation.org//NONSGML kigkonsult.se iCalcrea
 tor 2.30.10//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:16a6df8c-6aff-4f1b-a670-1132b9491aa6
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>
X-WR-RELCALID:ebedaa6494c261e57feb3f6c089eb9c2
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
TZNAME:EST
DTSTART:20261101T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RDATE:20271107T020000
RDATE:20281105T020000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:EDT
DTSTART:20270314T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RDATE:20280312T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:c74a7a15-0e4c-442a-97a3-658a60d74799
DTSTAMP:20260724T190134Z
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:20270711T000000
DTEND;TZID=America/New_York:20270711T235900
LOCATION:
SUMMARY:1865: First US patent for cipher device to Edwin H. Hawley
END:VEVENT
END:VCALENDAR