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US 4,838,794 AGranted
Metric block toy
OwnerLyman Coddingtoninventor
Life of this patent
Estimating the term…
Abstract
A metric block toy comprising ten blocks of varying colors, each block being a one tenth of a meter cube, and having indicia designating ten centimeter increments along one edge of each block, together with other legends designating the length of the edge invarying metric terms. The blocks, when placed in aligned relation, indicate the total length of one meter.
Claims2
A set of toy blocks for teaching the metric system comprising:
- ten cubic blocks each of the dimension ten centimeters square, and having six square exposed surfaces;
- one of said exposed surfaces having a rectangular edge, said edge having nine equally spaced gradations thereon designating a distance of one centimeter, said surface having a legend indicating the total length of said edge;
- a second of said exposed surfaces having a legend indicating the volume of said block in terms of metric measurement;
- a third of said exposed surfaces bearing a legend indicating the mass of said block in terms of metric measurement;
- three similarly exposed gradated surfaces having legends corresponding to 0.1 meter, 100 millimeters, and 1 decimeter respectively.
2 more elements
Dependencies are inferred from the claim text.