Dear Mrs. B:

You wrote:
> When using a trademarked word, should it be used as an adjective? For
> example, A presentation was given on Tough Cotton(tm)technology. Or
> should it be used as a noun? For example, A presentation was given on
> Tough Cotton(tm).
>

In modern English, just about any noun can sometimes be used as an adjective. That is certainly true for brand names as well; think of slogans like “The Ford family of fine cars.” Either example above could be grammatically correct. The question then becomes this: Which is more precise?

If Tough Cotton is a kind of technology (e.g., the Wankel engine), and the presentation is on the technical aspects of the product, then you would want to use the first sentence. If Tough Cotton is another type of product and/or the presentation is not technical in nature, then you would have to choose the second one. The question is not one of mere grammar, but of precision.