BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//archive.cryptologicfoundation.org//NONSGML kigkonsult.se iCalcrea
 tor 2.30.10//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:0462ceed-3312-40af-ad4d-9455911f7973
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:1bca53ff0d32342c510dda8c92e7a5a5
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
TZNAME:EST
DTSTART:20251102T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RDATE:20261101T020000
RDATE:20271107T020000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:EDT
DTSTART:20260308T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RDATE:20270314T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:d71635f3-ccee-4dd4-8cde-e9bf245a716c
DTSTAMP:20260424T093514Z
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
END:VEVENT
END:VCALENDAR