Not sure if this is too simple a question.
I have a PDF-format file downloaded from the official site of the paper's authors. This file describes a technique that I want to use in my commercial software. Is there a simple, foolproof way to tell whether the technique has been patented (by the authors of the paper)?
Things I've tried:
- E-mailed some of the authors. But I didn't get a response
- Searched patents.google.com (for the paper title, then for one of the author's names) but patents.google.com doesn't guarantee it contains all existing patents.