In this piezoelectric oscillation assembly there are included several piezoelectric oscillation devices, each including a first oscillation plate, a piezoelectric oscillation element attached to the first oscillation plate, and a second oscillation plate layered against the first oscillation plate so...http://www.google.fr/patents/US4751419?utm_source=gb-gplus-shareBrevet US4751419 - Piezoelectric oscillation assembly including several individual piezoelectric oscillation devices having a common oscillation plate member
Piezoelectric oscillation assembly including several individual ...
