Blocks assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 2021
Grant Date -
Jun 6, 2019
app pub date -
Dec 4, 2017
filing date -
Dec 4, 2017
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Non-US Coverage
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Abstract
A blocks assembly is provided. The assembly is formed of a base with an arch attached thereto. A number of blocks are slideably attached to the arch and confined by the base. The blocks can be slid from one side of the arch to the other. Markings on each side of the arch indicate how many blocks are on each side of the arch. Addition, subtraction, and general mathematical principles and relationships can be taught by movement and manipulation of the blocks.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
VLIET JOHN | FAIRHAVEN MA |
International Classification(s)

- 2017 Application Filing Year
- G09B Class
- 1927 Applications Filed
- 1167 Patents Issued To-Date
- 60.57 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Vliet, John | Fairhaven, US | 2 | 0 |
# of filed Patents : 2 Total Citations : 0 |
Cited Art Landscape
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Patent Citation Ranking
- 0 Citation Count
- G09B Class
- 0 % this patent is cited more than
- 4 Age
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Maintenance Fees
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7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 23, 2028 |
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