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The exact date is not known. The concept was invented by André Cassagnes in the late 1950s. He first exhibited a prototype in 1957. He took it to a French plastic molding company, which filed a patent on it in 1959 (leaving Cassagnes' name off the patent application). Subsequently, the Ohio Art Company bought the invention and announced the product on July 12, 1960.
What else can I help you with?
What causes 2 etchasketch like lines black and a hint of green from top to bottom of screen one full line and one partial that happened after screen locked up overnight even when puter is off?
u maybe dropped it a lot.
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