In 1948, the first successful long-playing microgroove phonograph records were introduced to the public at the Waldorf-Astoria Hotel in New York City. Made of nonbreakable Vinilyte plastic, and designed for the new speed of 33-1/3 r.p.m., the records were developed by Dr. Peter Goldmark of Columbia Records. The 12 inch record could play 23 minutes per side, as compared to only 4 minutes per side on the earlier 78 rpm record. The LP was also an improvement by the quietness of its surfaces and its greatly increased fidelity. The first LP featured violinist Yehudi Menuhin. Columbia originated the term “LP” itself, which was copyrighted. Thus, although many other firms could make long-playing records, only Columbia could make an LP.