PIEZOELECTRIC PRODUCTS, INC, A CORP. OF MASS.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4595338 Non-vibrational oscillating blade piezoelectric blowerExpiredNov 17, 83Jun 17, 86[F01D]
4475823 Self-calibrating thermometerExpiredApr 09, 82Oct 09, 84[G01K]
4461968 Piezoelectric relay with magnetic detentExpiredJan 11, 82Jul 24, 84[H01L]
4456394 Piezoelectric printer and asymmetric piezoelectric actuator used thereinExpiredMar 31, 82Jun 26, 84[H01L, B41J]
4435667 Spiral piezoelectric rotary actuatorExpiredApr 28, 82Mar 06, 84[H04R]
4387318 Piezoelectric fluid-electric generatorExpiredJun 04, 81Jun 07, 83[H04R]
4362407 Piezoelectric printer and piezoelectric multilam actuator used thereinExpiredSep 08, 81Dec 07, 82[B41J]

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