U.S. federal trademark · Serial No. 75610570 · Reg. No. 334431
Piezoelectrical resonators, oscillators based on piezoelectrical resonators, sensors based on piezoelectrical resonators, and measurement systems based on sensors of piezoelectrical resonators, said systems comprised of a resonator element, namely, a piezoelectrical resonator or an oscillator based on a piezoelectrical resonator or a sensor based on a piezoelectrical resonator and, in addition to the resonator element, a hermetically sealed housing for the resonator element, which housing [ in ] * is * sometimes furnished with electric circuitry, a heating means, and a [ flangs ] * flange * for holding the resonator element to the housing
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