|Luogo:||Buenos Aires, Argentina|
|Link al brevetto:|
|US1068982 (espacenet), US1068982 (uspto)|
Issue date: Jul 29, 1913
This invention relates to improvements in calculating machines adapted to perform the operations of multiplication, division, etc. The especial objects of my present invention are to produce a machine of the character stated that can be economically manufactured and easily operated, and that will perform its functions accurately and quickly.