Dunlap Bennett & Ludwig

Dunlap Bennett & Ludwig: Patent Litigation Summary

Date: 2026-05-06

Dunlap Bennett & Ludwig PLLC is a veteran-owned, mid-sized national law firm with a significant intellectual property practice. While the firm has numerous offices across the United States and several international locations, its IP practice is notably recognized in the Northern Virginia/D.C. metro area. Chambers and Partners ranks the firm in Band 3 for Intellectual Property in Northern Virginia, a competitive market driven by technology and government contracting sectors. The firm is not consistently ranked in the AmLaw 200, positioning it as a substantial national firm outside the traditional "BigLaw" category.

The firm's intellectual property group handles a broad range of technologies, including software, biotechnology, mechanical inventions, and advanced manufacturing. Their website describes experience in patent disputes for both plaintiffs and defendants. The provided case data shows a single recent appearance on the plaintiff side, with attorney Robert P. Greenspoon acting as of counsel in Disintermedation Services Inc. v. DISH Network Corporation. This limited data point suggests a practice that includes representing patent holders in enforcement actions.

Dunlap Bennett & Ludwig promotes an integrated intellectual property practice that handles litigation in federal courts as well as proceedings before the Patent Trial and Appeal Board (PTAB). The firm explicitly states it has experience representing patent holders in PTAB proceedings, including inter partes review (IPR), and notes it has prevailed in federal appeals where the PTAB had initially ruled against a patent. The firm's materials mention a winning record in federal appeals and success in obtaining preliminary injunctions in patent cases, though specific case names for these outcomes are not always provided.

The firm's patent litigation practice is managed by partners with extensive experience. Robert P. Greenspoon, a partner in the Chicago office, is a registered patent attorney who manages the firm's patent prosecution team and litigates cases through trial and appeal. His biography lists experience at the Federal Circuit and the U.S. Supreme Court, and he has been named an Illinois Super Lawyer for Intellectual Property Litigation from 2012 to 2025. Other key partners in the broader IP group include Thomas Dunlap and Alex Butterman in the D.C. Metro Area and Joseph Diamante in New York, who have been recognized by the World Trademark Review 1000 for their work.