The EBow or ebow is a brand name of Heet Sound Products, of Los Angeles, California, for the original type of handheld string resonator, invented by Greg Heet in 1969, first marketed in 1976, and patented in 1978. The name Ebow stands for "Electronic Bow" or Energy Bow) (often spelled E-bow in common usage). The EBow is a battery-powered electronic device for playing the electric guitar.