FR449233A - Improvement in typewriters - Google Patents

Improvement in typewriters

Info

Publication number
FR449233A
FR449233A FR449233DA FR449233A FR 449233 A FR449233 A FR 449233A FR 449233D A FR449233D A FR 449233DA FR 449233 A FR449233 A FR 449233A
Authority
FR
France
Prior art keywords
typewriters
improvement
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
Ehrenfried Mirus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Application granted granted Critical
Publication of FR449233A publication Critical patent/FR449233A/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
    • G09C3/02—Typewriters for ciphering or deciphering cryptographic text with auxiliary keys or keyboards acting on the original keys or keyboards

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR449233D 1912-06-27 1912-06-27 Improvement in typewriters Expired FR449233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR449233T 1912-06-27

Publications (1)

Publication Number Publication Date
FR449233A true FR449233A (en) 1913-02-20

Family

ID=1489779

Family Applications (1)

Application Number Title Priority Date Filing Date
FR449233D Expired FR449233A (en) 1912-06-27 1912-06-27 Improvement in typewriters

Country Status (1)

Country Link
FR (1) FR449233A (en)

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