Copyright Aid

Hi AndyJ,

Thank you for your detailed and much appreciated explanation! I might have a follow-up question later down the road but for now you have answered my question.

I want to create a physical item which adds a new functionality to an existing branded item. As an example, one could create an item which improves the experience of using a Britta filter. Would I be able to sell such a 'product enhancer' legally without asking for Britta's permission? To clarify ...