intvnut Posted October 28, 2018 Share Posted October 28, 2018 While doing some other research, I discovered that Mattel actually was issued a patent for the color coding they implemented in ECS BASIC! US Patent 4,617,643: Syntax error correction method and apparatus I've attached the full PDF. Or, you can follow the link above. US4617643.pdf 7 Quote Link to comment Share on other sites More sharing options...
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