Q: Is patent advice covered by attorney-client privilege?

Advice is usually privileged and confidential if it reflects a legal
question from a client, such as in a patent infringement opinion. Such
an opinion would normally only be revealed if the client decided to rely
on it at a trial. In almost all jurisdictions, patent agent advice has
the same privilege as attorney advice.

http://www.usenet.com/newsgroups/misc.answers/msg00200.html

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