Title:
NOTCH-TYPE ROUGH CALCULATION COUNTER
Document Type and Number:
Japanese Patent JP2009282943
Kind Code:
A
Abstract:
To provide a portable notch-type rough calculation counter which provides a rough estimate of numerical addition or subtraction with a simple operation.
In the notch-type rough calculation counter, a body with a scale has a rail with notches, a slider for indicating a numerical value is provided in the rail, a value for a unit of the scale is counted by using the slider, so that an added or subtracted numerical value can be acquired.
Inventors:
MUTO HITOSHI
Application Number:
JP2008155961A
Publication Date:
December 03, 2009
Filing Date:
May 19, 2008
Export Citation:
Assignee:
HS MACHINE KK
International Classes:
G06G1/06