[eridius]

Actually I have a better argument against this than my other.

No, "products from brand A" is never a category. However, a company may create a brand new market with a product, and they may be the only company with a product in that market for a while. But that still doesn't mean the category is "products by that company", it just means it's whatever new category was created from the product.

For example, the iPhone arguably created a new category of smartphones. But competitors quickly introduced their own products in this same category (e.g. Android).