FR672543A - Typewriter Improvements - Google Patents

Typewriter Improvements

Info

Publication number
FR672543A
FR672543A FR672543DA FR672543A FR 672543 A FR672543 A FR 672543A FR 672543D A FR672543D A FR 672543DA FR 672543 A FR672543 A FR 672543A
Authority
FR
France
Prior art keywords
typewriter
typewriter improvements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Gaston-Edward Wilkinson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR672543A publication Critical patent/FR672543A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C3/00—Typewriters for ciphering or deciphering cryptographic text
    • G09C3/04—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member
    • G09C3/06—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member the connections being mechanical

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR672543D 1929-04-04 1929-04-04 Typewriter Improvements Expired FR672543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR672543T 1929-04-04

Publications (1)

Publication Number Publication Date
FR672543A true FR672543A (en) 1929-12-30

Family

ID=9017544

Family Applications (1)

Application Number Title Priority Date Filing Date
FR672543D Expired FR672543A (en) 1929-04-04 1929-04-04 Typewriter Improvements

Country Status (1)

Country Link
FR (1) FR672543A (en)

Similar Documents

Publication Publication Date Title
FR687892A (en) Typewriter Improvements
FR661522A (en) Typewriter Improvements
FR720271A (en) Typewriter Improvements
FR713539A (en) Typewriter Improvements
FR713423A (en) Typewriter Improvements
FR691736A (en) Typewriter Improvements
FR713596A (en) Typewriter Improvements
FR697473A (en) Typewriter Improvements
FR686282A (en) Typewriter Improvements
FR719564A (en) Typewriter Improvements
FR728929A (en) Typewriter Improvements
FR672543A (en) Typewriter Improvements
FR685865A (en) Typewriter Improvements
FR685946A (en) Typewriter Improvements
FR666160A (en) Typewriter Improvements
FR665026A (en) Typewriter Improvements
FR686694A (en) Typewriter Improvements
FR661966A (en) Typewriter Improvements
FR665845A (en) Typewriter Improvements
FR696013A (en) Typewriter Improvements
FR696152A (en) Typewriter Improvements
FR704759A (en) Improvements to typewriters
FR705486A (en) Improvements to typewriters
FR654996A (en) Typewriter Improvements
FR684651A (en) Typewriter Improvements