crystal sensors; piezoelectric crystal oscillators; piezoelectric crystal units, namely, tuning fork crystal units, megahertz (mhz) range AT Crystal units, AT cut crystal resonators and surface acoustic wave (SAW) resonators; piezoelectric crystal filters; atomic oscillators; optical glass, not for building; optical apparatus and instruments, namely, optical devices in the nature of optical filters, optical wave plates, dichroic optical prisms, trichroic optical prisms, polarized beam splitter (PBS) prisms, p-polarized and s-polarized (PS) Converters, and Cross Prisms for liquid crystal display (LCD) projectors, video projectors, liquid crystal on silicon (LCOS) projectors, light emitting diode (LED) projectors and cathode ray tube (CRT) projectors, optical pickups, namely, read heads for optical drives, optical mirrors, optical frequency metrology plates, optical grating in the nature of a component that is based on a periodic variation of the refractive index on optical glass used in optical pickups for tracking servo systems and spectral analyzer as dispersion elements; optical apparatus and instruments, namely, optical low pass filters, heat sinkplates for liquid crystal display (LCD) projectors, video projectors, liquid crystal on silicon (LCOS) projectors, light emitting diode (LED) projectors and cathode ray tube (CRT) projectors, and etalon optical filters; electronic machines, apparatus and their parts, namely, oscillators, namely, optical pickups, namely, read heads for optical drives, TXCO (Temperature Compensated Crystal Oscillator), VCXO (Voltage Controlled Crystal Oscillator), OCXO (Oven Controlled Crystal Oscillator), programmable oscillators, clock oscillators, and atomic oscillators, namely, RB (Rubidium) oscillators; Electronic machines, apparatus and their parts, namely, crystal units and resonators, namely, tuning fork crystal resonators and AT Cut crystal resonators; Electronic machines, apparatus and their parts, namely, SAW (Surface Acoustic Wave) devices, namely, SAW resonators, and SAW filters; Electronic machines, apparatus and their parts, namely, crystal filters, namely, monolithic crystal resonator filters; Electronic machines, apparatus and their parts, namely, electronic components and passive electronic components, namely, synthetic quartz crystals, lumbered quarts crystals, and crystal blanks, crystalline synthetic quartz and other crystalline piezoelectric materials used in piezoelectric devices for optical apparatus and devices, measuring or testing machines and instruments, piezoelectric oscillators, piezoelectric crystal units and piezoelectric filters; electronic machines, apparatus and their parts, namely, synthetic quarts and other crystalline piezoelectric materials processed in the form of wafers used in piezoelectric devices for optical apparatus and devices, measuring or testing machines and instruments, piezoelectric oscillators, piezoelectric crystal units and piezoelectric filters