That's why I was surprised to see a response in which the Applicant submitted a product brochure to the Examiner and made the following statement:
First, in order to aid in the Examiner's better understanding of the present invention, enclosed herewith are brochures of the "Voyager" electronic device which depicts the technical features and advantages of the present invention.
When I ran across this file history, here's what occurred to me: could an accused infringer attempt to construe the claims to include these features from the brochure? Product brochures are often full of details and product advantages — two things that I don't want to be read into the claims. I don't think that a court should, or even would, read such features into the claims. But why give the accused infringer something to argue about?
I note that the practitioner did limit the actual arguments to the claim language, rather than arguing outside the claims, so that might reduce the risk. But I'd think very carefully before submitting a product brochure to help distinguish over the art.