Phil is one of the founders of Carlson Caspers.  He is a litigator with 30+ years of experience concentrated on complex, high technology patent matters.  Phil has also been the lead counsel in over a hundred post-grant proceedings in the USPTO.  Leveraging a technology background and real world experience, Phil brings sound business judgment to every case and excels at credibly transforming the analysis of complex technology and patent issues into easy to understand arguments and delivering those arguments in powerful, visual form.  Early in his career, Phil got the chance to demonstrate those skills.  He was part of a two-attorney team that tried a patent case on photoelectric sensors for Banner Engineering (Banner Eng’g Corp. v. Tri-Tronics Co.).  The team won that case, invalidating the patent and ultimately winning a decision to recover attorney fees.  “The Banner Engineering case gave me some early, invaluable insights into what it takes to prepare and try a patent case.”  Leveraging that early experience, from 1996 to present, Phil has been lead counsel in dozens of patent matters, representing patent-savvy companies such as 3M, ADC Telecommunications, TE Connectivity and Emerson Electric companies.

Phil has earned the reputation of getting consistent positive results. Phil’s wins include a $30 million judgment in a patent case involving telecommunication infrastructure and an impressive $75 million result for ADC Telecommunications involving wireless OFDM technology. “The OFDM project was truly one of my most professionally rewarding projects,” says Phil. “In 2004, I was asked to assess the value of a pending application relating to a divested business unit and monetize it. Even though the underlying product was a wired communication system, we concluded the communication protocol was potentially relevant to the next generation emerging wireless standards. At the time the project came in, I had no issued patent claims to work with, the wireless standards were still evolving, and there was no product on the market.” Phil developed a long-term strategy to develop and market the portfolio and ultimately negotiated the sale of the portfolio for $75 million in 2011.

University of Minnesota Law School, JD, cum laude, 1988

Hamline University, BA, Physics, 1984, summa cum laude
Phi Beta Kappa
Recipient of “Hamline University Presidential Scholarship”

University of Minnesota, graduate school
Electrical Engineering Dept.
Completed one year of graduate school course work while employed as an engineer in Honeywell’s Solid-State Electronics Division.

Minnesota Supreme Court

US District Court for the District of Minnesota

US Court of Appeals for the Federal Circuit

US Patent and Trademark Office

ADC Telecommunications, Inc. v. Commscope Solutions Properties, LLC and Commscope Solutions, Inc.

Carlson Caspers successfully enforced ADC patents relating to advanced telecommunications jacks and panels against Commscope products.

$30 Million Judgment for ADC and an Injunction Against all Accused Products (ADC Telecommunications Inc. v. Thomas & Betts Corporation...

ADC contacted Phil Caspers to assess a potential case relating to telecommunications infrastructure patents.  Early on, we concluded it was a strong lost profits case, but to get this defendant to pay fair...

DLP TV Light Engine Litigation for 3M (3M v. Infocus Et Al., 3M v. Samsung Et Al.

Phil Caspers and Sam Hamer successfully enforced a 3M patent directed to advanced light engine technology incorporating deformable mirror devices used in consumer electronics including projection TVs and projectors. The team compelled large...

Litigation for An Emerson Electric Company on Advanced Analog-To-Digital Converter (CSI Technology, Inc. Et Al. v. Commtest Instruments LTD. Et...

Phil Caspers, Sam Hamer and Joe Winkels successfully enforced patents on behalf of CSI Technology, Inc. (an Emerson Electric Company subsidiary) relating to machinery health maintenance vibration data analyzers incorporating sigma-delta analog-to-digital converters. In...

ADC Telecommunications, Inc. v. Panduit Corp.

Our firm successfully enforced ADC patents relating to fiber optic cable routing systems against Panduit cable routing products.

ADC – Licensing Project for Client’s Core Fiber Optic Connectivity Patent Portfolio

Through study of portfolio and relevant market, developed flexible “al la carte” licensing structures with customer field of use terms to support client’s core business. Defined flexible “A La Cart” Licensing Program Defined...

Wireless Standards Litigation: LTE

Carlson Caspers investigated and enforced patents that read on the 3GPP LTE communications standards against an LTE device manufacturer and distributor. The inventions described improved strategies for channel prioritization using quality of service...

Wireless Standards Litigation: Adaptive Frequency Hopping In Bluetooth

Carlson Caspers enforced a patent that read on the Bluetooth personal area network standards against a smart phone manufacturer.  The invention at issue described sophisticated frequency hopping strategies that improve coexistence with other...

$75 Million Win for Wireless OFDM Portfolio

Phil Caspers, Sam Hamer and Joe Winkels scored a $75 million win for ADC Telecommunications, Inc. Following the dot-com bubble, ADC divested its data transport business unit, but retained the patent assets. Looking...

Minnesota Monthly 2024 Top Lawyers in Minnesota
Minnesota Super Lawyers® consistently lists Phil among the Top 100 Super Lawyers

Best Lawyers® 2001-2025
Litigation—Intellectual Property
Litigation—Patent

“2018 Lawyer of the Year—Litigation-Intellectual Property”
“2016 Lawyer of the Year—Litigation-Patent“

IAM Patent 1000 and Managing IP Magazine have repeatedly listed Phil among their list of IP Stars.

Attorney of the Year (Groups), 2022, Minnesota Lawyer