Math roll, an aid for displaying math information/facts

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11450231
APP PUB NO 20210233426A1
SERIAL NO

17228772

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A math aid that strengthens addition, subtraction, multiplication and division skills as well as math memory. Math facts are displayed on two stuffed rolls using horizontal strips, color differences, various digit sizes and a roll shape all used to increase ease and focus on seeing selected facts for a math problem. Each roll displays numbers in a horizontal row for counting and subtracting. One of the rolls displays a column of even multiplicands, a row of multipliers, and corresponding rows of quotients. The second roll has a similar display but provides a column of odd multiplicands. In using the aid, one selects the facts needed by rotating the roll to the strip of facts needed, then flattening the roll enough to hold its position to see those needed facts.

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Patent Owner(s)

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International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wilson, Mark Jonathan N. Potomac, US 5 34

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Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 20, 2026
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 20, 2030
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 20, 2034
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00