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US Patent 10559224 Digit card calculator

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
10559224
Date of Patent
February 11, 2020
Patent Application Number
16093673
Date Filed
April 20, 2017
Patent Citations Received
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US Patent D962984 Display screen or portion thereof with graphical user interface
‌
US Patent 11252118 Systems and methods for digital privacy controls
‌
US Patent 11354020 Macro-navigation within a digital story framework
‌
US Patent 11388132 Automated social media replies
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US Patent D912700 Display screen with an animated graphical user interface
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US Patent D912693 Display screen with a graphical user interface
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US Patent D912697 Display screen with a graphical user interface
‌
US Patent D913314 Display screen with an animated graphical user interface
...
Patent Primary Examiner
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Chuong D. Ngo
Patent abstract

A digit card calculator is implemented on a touch screen computer. The calculator presents a user input area to receive input of an arithmetic problem. The calculator then presents a workspace area where the digits of the numbers in the arithmetic problem are presented as rectangular digit cards. The digit cards are arranged in place value columns. Bead tokens are presented on digit cards. Each bead token shows or implies the number of beads in the place value of a column. The number of bead tokens on a digit card is equal to the number on the digit card. Individual columns in the arithmetic problem are solved by touching a digit card and moving it down. Carrying in an addition problem is shown by the movement of carry cards. Borrowing in a subtraction problem is shown by the movement of digit tokens from one column to the next.

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