James A. Gammon, 77, a Washington lawyer who specialized in communications law, died of pancreatitis Aug. 3 at the Manor Care rehabilitation facility in Chevy Chase.

Mr. Gammon had practiced law in Washington since the late 1950s, and he was a founder of the firm of Gammon and Grange. He also founded Gammon Media Brokers, which brokered the sale of broadcast stations. About five years ago, he began a process of gradual retirement, but he continued to go to the office weekly.

James Alan Gammon, a Chevy Chase resident, was born in Keokuk, Iowa. He graduated in 1956 from the University of Notre Dame in Indiana and from Georgetown University law school in 1959.

Survivors include his wife of 54 years, Joanne Mott Gammon of Chevy Chase; five children, Daniel Gammon of Lucketts, Thomas Gammon of Coral Gables, Fla., Matthew Gammon of Gaithersburg, Kelly Gammon White of Silver Spring and Timothy Gammon of Fairfax County; 14 grandchildren; and three great-grandchildren.