Sumner Lawyers

Licensed to practice law in the state of Illinois and registered to practice before the US Patent and Trademark Office. Experienced with IP (patents, trademarks, trade secrets) law in both corporate environments (Blackberry, Conversant IP Management) as well as individual inventors. Well versed in Business Law, Residential and Commercial Real Estate, Commercial and Residential Contracts, Wills, Trusts, Mergers and Acquisitions. Has 22 issued US patents and 30 additional issued patents worldwide. Held the roles as General Counsel, Senior Patent Attorney at Conversant IP Management, Leading Patent Prosecution Litigation Management for Conversant, Senior Licensing Counsel at Blackberry focusing on prosecution with concentration...

Karl J. Wulff, (BA ’93, JD ’96) is the firm’s principal attorney. He received his Bachelor of Arts degree from Webster University in 1993. He received his Juris Doctor degree from Oklahoma City University School of Law in 1996. Prior to attending university Mr. Wulff served in the United States Navy on board the amphibious assault aircraft carrier U.S.S. Tripoli (LPH-10) in the air department from 1987 to 1989 and later on board the aircraft carrier U.S.S. Saratoga (CV-60) as a reservist, earning the Sea Service Ribbon and the National Defense Medal. Mr. Wulff is a member of the National...

Experienced intellectual property attorney handling patents, trademarks, trade secrets, copyrights, licensing and litigation. Registered patent attorney.

Member of Illinois Bar Association Member American Bar Association