How is Yongnuo allowed to copy Canon, and why does Canon allow it? Does Canon see a significant loss in sales to Yongnuo?
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2I'm voting to close this question as off-topic because it is about intellectual property laws and patents in the context of manufacturing and isn't about taking photos. – Michael C Apr 17 '15 at 04:05
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Which stack would be more appropriate? – davidtgq Apr 17 '15 at 04:17
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@vandidant, check for stack, related to law and stack, related to business. Because your question contain two questions from different areas – Romeo Ninov Apr 17 '15 at 04:34