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Toy building blocks

  • US 6,050,873 A
  • Filed: 07/13/1998
  • Issued: 04/18/2000
  • Est. Priority Date: 07/14/1997
  • Status: Expired due to Fees
First Claim
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1. A toy building block made of a semi-rigid plastic material and joinable to at least one other building block, comprising:

  • a plurality of projections extending from at least one surface of said block, and undercut recesses disposed on the surface opposite to said at least one surface, at least some of which recesses being in substantial alignment with said projections, said projections having a head portion and a neck portion of reduced size and constituting male joining means, said undercut recesses constituting female joining means, being at least partial counterparts of said projections,wherein, in said building block, imaginary vertical planes, passing through center lines of pairs of said projections, include an acute angle with each other.

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