Scott J. Fields, 47, of Maple Glen, a lawyer who was an expert in intellectual property law, died of heart failure Monday at home.

Since founding National IP Rights Center in Blue Bell in 2004, Mr. Fields had filed hundreds of Internet and business method patents for clients representing Internet service providers; prepared agreements in all areas of Internet and electronic commerce; and litigated trademark and service mark disputes.

He also headed two Internet start-ups; was legal editor for Patent Cafe Inc.; and was counsel to the Office of Unfair Import Investigations of the U.S. International Trade Commission in Washington.

Before establishing his own firm, he had been a partner with the firms of Obermayer, Rebmann, Maxwell & Hippel; Klehr, Harrison, Harvey, Branzburg & Ellers; and Synnestvedt & Lechner in Philadelphia.

Mr. Fields graduated from Cheltenham High School. He earned a bachelor's degree in economics from Pennsylvania State University; a bachelor's degree in engineering from Temple University; and a law degree from George Washington University.

In 1990, he married Joanne Wellikson Fields, whom he had met at a Jewish singles social. He enjoyed planning home-improvement projects and spending time with his wife and two children, Fredric and Brittany.

Mr. Fields is also survived by his mother, Janet Zundell Fields.

The funeral will be at 10 a.m. tomorrow at Joseph Levine & Sons Memorial Chapel, 4737 Street Rd., Trevose. Burial will be in Roosevelt Memorial Park, Trevose.