This is an interesting subject matter. The issue does not seem to be settled in the courts either.
Taking one's own photo of a product and using it to re-sell the product would not be considered copyright infringement by most.
The other side of that coin is that the "design and artwork" on the product label could be considered protected copyright. If that is the case, then taking a photo (even though it is yours) may be deemed infringement.
I have read where certain Federal courts have ruled that "thumbnail" photos are not infringement since the details of the label and such are not really readable.
It seems that some product makers are trying to control distribution and the use of Trademarks by claiming copyright infringement for artistiic design, when imo, they are trying to get around the "first sale doctrine" or "exhaustion principle" which allows the re-selling of product once in has entered the market.
see previous thread also.
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