With respect to the spawned discussion, I found this on wikipedia:
The Lego Group began in the workshop of Ole Kirk Christiansen (born 7 April 1891), a carpenter from Billund, Denmark, who began making wooden toys in 1932.[1] In 1934, his company came to be called "Lego", from the Danish phrase leg godt, which means "play well".
It expanded to producing plastic toys in 1947.[1] In 1949 Lego began producing, among other new products, an early version of the now famous interlocking bricks, calling them "Automatic Binding Bricks". These bricks were based in part on the Kiddicraft Self-Locking Bricks, which were patented in the United Kingdom in 1939[2] and then there released in 1947.
Lego modified the design of the Kiddicraft brick after examining a sample given to it by the British supplier of an injection-molding machine that the company had purchased.[3] The bricks, originally manufactured from cellulose acetate,[3] were a development of traditional stackable wooden blocks that locked together by means of several round studs on top and a hollow rectangular bottom. The blocks snapped together, but not so tightly that they required extraordinary effort to be separated.
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The definitive shape of the Lego bricks, with the inner tubes, was patented by the Lego Group in 1958. Several competitors have attempted to take advantage of Lego's popularity by producing blocks of similar dimensions, and advertising them as being compatible with Lego bricks.
In 2002, Lego sued the CoCo Toy Company in Beijing for copyright infringement over its "Coko bricks" product.
CoCo was ordered to cease manufacture of the products, publish a formal apology and pay damages.[23]
The English company Best-Lock Construction Toys was sued by Lego in German courts in 2004,[24] and 2009.[25] but the
Federal Patent Court of Germany denied Lego trademark protection for the shape of its bricks. [26] The Canadian company Mega Bloks were sued by Lego in 2005 for trademark violation, but the
Supreme Court of Canada upheld Mega Bloks rights to sell their product.[27] In 2010, the
European Court of Justice ruled that the eight-peg design of the original Lego brick "merely performs a technical function [and] cannot be registered as a trademark."[28]
(full article, with references here:
http://en.wikipedia.org/wiki/Lego)