AT177943B - One-hand operation for calculation machines - Google Patents

One-hand operation for calculation machines

Info

Publication number
AT177943B
AT177943B AT177943DA AT177943B AT 177943 B AT177943 B AT 177943B AT 177943D A AT177943D A AT 177943DA AT 177943 B AT177943 B AT 177943B
Authority
AT
Austria
Prior art keywords
hand operation
calculation machines
machines
calculation
hand
Prior art date
Application number
Other languages
German (de)
Inventor
Leopold Jahn
Josef Zitzmann
Original Assignee
Leopold Jahn
Josef Zitzmann
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 Leopold Jahn, Josef Zitzmann filed Critical Leopold Jahn
Application granted granted Critical
Publication of AT177943B publication Critical patent/AT177943B/en

Links

AT177943D 1953-02-25 1953-02-25 One-hand operation for calculation machines AT177943B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT177943T 1953-02-25

Publications (1)

Publication Number Publication Date
AT177943B true AT177943B (en) 1954-03-25

Family

ID=3659573

Family Applications (1)

Application Number Title Priority Date Filing Date
AT177943D AT177943B (en) 1953-02-25 1953-02-25 One-hand operation for calculation machines

Country Status (1)

Country Link
AT (1) AT177943B (en)

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