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Vibrating piece, vibrator, oscillator, and electronic device App 20040155561 - Tanaya, Hideo ;   et al. | 2004-08-12 |
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Vibrating reed, vibrator, oscillator, and electronic device App 20020121941 - Sakata, Junichiro ;   et al. | 2002-09-05 |
Vibrating piece, vibrator, oscillator, and electronic equipment App 20020089386 - Kitamura, Fumitaka ;   et al. | 2002-07-11 |