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Why does LEGO have competitors such as Mega Bloks, who have not been taken out of business due to legal repercussions of manufacturing particularly similar toys? - Quora
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LEGO VIP Limited Edition Print Japanese 1968 Patent Application Duplo 5006007 | eBay
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LEGO VIP Limited Edition Print Japanese 1968 Patent Application Duplo 5006007 | eBay
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How Lego Patents Helped Build a Toy Empire, Brick by Brick | Innovation| Smithsonian Magazine
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How Lego Patents Helped Build a Toy Empire, Brick by Brick | Innovation| Smithsonian Magazine
LEGO VIP Limited Edition Print Japanese 1968 Patent Application Duplo 5006007 | eBay
