FR509720A - Improvements to calculating machines - Google Patents

Improvements to calculating machines

Info

Publication number
FR509720A
FR509720A FR509720A FR509720DA FR509720A FR 509720 A FR509720 A FR 509720A FR 509720 A FR509720 A FR 509720A FR 509720D A FR509720D A FR 509720DA FR 509720 A FR509720 A FR 509720A
Authority
FR
France
Prior art keywords
calculating machines
machines
calculating
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
FR509720A
Other languages
French (fr)
Inventor
Louis-Marie Faguer
Jacques De Vellefrey
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.)
JACQUES DE VELLEFREY
Original Assignee
JACQUES DE VELLEFREY
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 JACQUES DE VELLEFREY filed Critical JACQUES DE VELLEFREY
Application granted granted Critical
Publication of FR509720A publication Critical patent/FR509720A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00—Input mechanisms
    • G06C7/02—Keyboards
    • G06C7/06—Keyboards with one set of keys for each denomination

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
FR509720A 1919-05-12 1919-05-12 Improvements to calculating machines Expired FR509720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR509720T 1919-05-12

Publications (1)

Publication Number Publication Date
FR509720A true FR509720A (en) 1920-11-18

Family

ID=8911227

Family Applications (1)

Application Number Title Priority Date Filing Date
FR509720A Expired FR509720A (en) 1919-05-12 1919-05-12 Improvements to calculating machines

Country Status (1)

Country Link
FR (1) FR509720A (en)

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