Engineers from Pennsylvania

Charles Stowe Myers FIDSA (December 7, 1906 – August 6, 1995) was an American industrial designer.

Clarence Walton Musser (April 5, 1909, Mount Joy, Pennsylvania – June 8, 1998) inventor of strain wave gearing and also credited with over 250 major inventions and discoveries.Some of his inventions were the Army recoilless rifle, aircraft personnel catapults, instrumentation for underwater detonation testing. His varied career includes experience in many diverse fields. He was research advisor to the Department of Defense for 15 years. With other industrial and government organizations, he has served as chief engineer, director of research, and consultant. He held professional engineering licences in Pennsylvania and Massachusetts. As a research adviser to United Shoe Machinery Corp., he explored nonrigid-body mechanics, using controlled deflection as an operating medium. In 1957 Musser announced invention of strain wave gearing also known as harmonic gearing (U. S. patent 2,906,143). He is also the inventor of first fluidic stepper actuators

James Graham Stewart (May 21, 1907 in Homewood, Pennsylvania – March 22, 1997 in Los Angeles, California) was an American pioneer in the field of sound recording and re-recording. His career spanned more than five decades (1928–1980), during which he made substantial contributions to the evolution of the art and science of film and television sound.