While living in Ellicott City in the 1990s, Mr. Marcus was ticketed in 1996 for having a "For Sale" sign on his car that he parked alongside a road, which was in violation of a county ordinance.

Mr. Marcus took his case to Howard County District Court and after successfully convincing Judge R. Russell Sadler that his First Amendment rights were being violated, the judge ruled the ordinance unconstitutional and relieved him of the $48 tickets.

"For Marcus, it is a matter of free speech and common sense. He notes that he could hang a dead chicken from his radio antenna or put up a sign that says 'Bob Dole is a Fink' or paint his car in 1960s psychedelic colors and still qualify as a law-abiding citizen," reported The Washington Post.

"I'm not on a big campaign to shut down the government. My campaign is to get rid of one opprobrious law," Mr. Marcus told the newspaper.

Mr. Marcus, who was a member of the American Civil Liberties Union, was a prolific contributor of hundreds of letters to the editors of newspapers. He also remained actively involved with MIT.

In 2011, Mr. Marcus and his wife, Peg Silloway, moved to Beaverton.

"I got tired of the extreme weather in Maryland, and the zoo of the I-95 corridor. We lit out for Portland, Oregon," Mr. Marcus wrote in his biographical notes. "We love the temperate climate and the great soil where anything grows. We love the laid back people and the wildly varied geology and geography that makes for wonderful traveling and photography."

Services were private.

In addition to his wife, Mr. Marcus is survived by a son, Gary Marcus of New York City; a daughter, Julie Marsden of Ellicott City; and a grandson. Earlier marriages to the former Marilyn "Molly" Purpel and Linda Marsden ended in divorce.

fred.rasmussen@baltsun.com