Daniel Hanson
Daniel Hanson is an attorney who has worked with a number of law firms and corporations, including BlackBerry Ltd. in Canada. His practice focuses upon patent preparation and prosecution.
Posts by Daniel Hanson
Proving a Negative Claim Limitation: A Tale of Three Nonprecedential Cases
In the past 10 months, the issue of proving negative claim limitations has cropped up on appeals to the Federal Circuit. At least three panels of the Federal …
Are All Safety-Related Inventions Obvious After Celgene?
The case of Celgene Corp. v. Peter, Nos. 2018-1167 et al. (Fed. Cir. July 30, 2019) has drawn attention for its decision that inter partes review (IPR) may be …
Don’t Let Experts Testify as to Obviousness
When obviousness of a patent claim is at issue, some experts may opine along these lines: "Therefore, the subject matter of claim 1 would have been obvious before …
Arguing Device-and-Method Eligibility Under the Present and Future States of U.S. Patent Law
Here's the hypothetical: A patent application has been filed for a new medical device. The device reads various physiological signals from a patient and presents, with previously …
Distinguishing Colloquial Obviousness and Legal Obviousness
Have you ever worked with a lay inventor who had a hard time dealing with obviousness under U.S. patent law? Many patent lawyers have. It is …
How to Be an Effective Advocate When Responding To Examiners
You're a patent prosecutor. You've just received an office action. The examiner has rejected your claims. You think the examiner got it wrong. On the technical issues, …
Sounds Fishy: Can Broadening Language Actually Be Limiting?
In a previous essay, I discussed a U.S. Supreme Court case that had nothing to do with patent law, but that patent practitioners may wish to …
Elgin v. Dept. of the Treasury and Preserving Constitutional Issues Before the USPTO
Those who practice in the field of patents tend to focus almost exclusively upon developments in patent law and pay less attention to developments in other areas …
