Biography
Yoshikatsu Ishida graduated from the electric course of Miyazaki Technical High School, Miyazaki, Japan, in 1963. He joined Taga Works, Hitachi Ltd., Ibaragi, in 1963. Since joining Tokai Works. Hitachi Ltd., Ibaragi, in 1973, he has been engaged in the development of audio equipment, SAW filters for cellular radio, and SAW filter application devices.