Ira B. Arnstein

Ira B. Arnstein (born Itzig Arenstein April 12, 1879 – September 13, 1956) was a musical composer, songwriter, and "chronic litigator".

Arnstein was born in Litzingen, Russia (now Letychiv Ukraine), the son of Bernard Solomon Arnstein and Sophia (Sophie) Kozovoc. He emigrated to the United States when he was eleven.

Litigation

It was noted that Arnstein experienced "copyright infringement persecution mania", always certain that others were stealing his work. He picketed ASCAP after being rejected by them for membership. In 1937, he launched a major lawsuit against twenty-three composers and publishers simultaneously and lost them all. The jurors were directed that in order to find infringement, a "two-pronged test" must be used.

a plaintiff had to show that the defendant had copied him (using charts or other diagrams) the plaintiff had to show that the copying was so extensive that it counted as infringement; a layperson must be able to hear the copied songs as essentially similar

Arnstein lost that lawsuit and had to pay Porter's legal fees. He never won any of the many cases he filed.