Derek F. Dahlgren

Derek F. Dahlgren

Derek F. Dahlgren is an attorney at Rothwell, Figg, Ernst & Manbeck P.C. Mr. Dahlgren’s practice encompasses all aspects of patent law including patent litigation, contested proceedings at the PTO, reexamination, prosecution, opinions and counseling. The opinions expressed are those of the author and do not necessarily reflect the views of Rothwell, Figg, Ernst & Manbeck, P.C. or its clients. Mr. Dahlgren's articles are for general information purposes and are not intended to be and should not be taken as legal advice.


Posts by Derek F. Dahlgren


The Saga Continues: Apple v. Samsung, Next Stop Supreme Court

Apple v. Samsung is not over. Samsung has stated it is going to file a petition for certiorari later this year with the Supreme Court. In its …
By Derek F. Dahlgren
5 years ago 1

Teva and What It Means for Apple v. Samsung and Design Patents

Two independent errors warrant reversal, but to be fair, the district court did not have the benefit of the Supreme Court’s decision in Teva. Now, the …
By Derek F. Dahlgren
5 years ago 3

An Opportunity for Clarity in Design Patent Damages

The Federal Circuit has a unique opportunity to clarify the law concerning damages under § 289 in the Apple v. Samsung case. Focusing on the scope of infringement and …
By Derek F. Dahlgren
5 years ago 2

Patent Eligibility Post-Alice

From a patent challenger’s perspective, Alice further reinforces the need to evaluate whether an early dispositive motion under § 101 can end the litigation. In crafting such motions, …
By Derek F. Dahlgren
6 years ago 6

The Role of Territoriality in Patent Exhaustion

Patent exhaustion is one of the most fundamental restrictions on patent rights. Under this doctrine, an authorized sale of a patented article moves it outside the scope …
By Derek F. Dahlgren
7 years ago 1