Electronic components, namely, programmed data-carrying electronic circuits, electronic timing and synchronizing circuits, electronic filters used for electronic circuits, piezoelectric filters, resonators, resonators adapted for use in computers, crystal resonators, piezoelectric resonators, electronic resonators used for electronic circuits, oscillators, oscillators adapted for use in computers, crystal oscillators, piezoelectric oscillators, electronic oscillators used for electronic circuits; electronic components in the nature of crystal filters used for electronic circuits; temperature sensors; infrared sensors; electronic sensors used for measuring physical quantity; gyro sensors, namely, gyroscopes, gyrometers, and gyrocompasses; acceleration sensors; piezoelectric type sensors for measuring pressure, acceleration, angle, temperature, and humidity, not for medical use; pressure sensors; optical apparatus and instruments, namely, optical filters; optical low pass filters for use in video cameras, digital still cameras, security cameras and digital single- lens reflex cameras; filters for optical devices, namely, optical thin films used as color compensation filters for various image pickup devices; heat radiation substrate for electronic products, namely, crystal plates used for heat radiation for LCD projectors; filters for optical devices, namely, crystal phase plate for filtering light for LCD projectors; optical instruments in the nature of wave plates, namely, wave plates for use in separating the polarizing properties of light, and depolarizers which transform the rays of light that become linearly polarized after passing through the double refraction plates into non-polarized rays of light; polarizers, namely, optical plates which convert natural light into polarization; hybrid integrated circuits