Taga Electric Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4911044 Ultrasonic vibration cutting deviceExpiredFeb 04, 88Mar 27, 90[B25B]
4864904 Ultrasonic vibrational cutting apparatusExpiredMar 02, 88Sep 12, 89[B23B]
4856391 Ultrasonic oscillation machining apparatusExpiredApr 22, 88Aug 15, 89[B23B]
4812697 Ultrasonic vibrator and a method of controllingly driving sameExpiredApr 03, 87Mar 14, 89[H01L]
4787265 Torsion vibratorExpiredSep 09, 86Nov 29, 88[F16F]
4764702 Ultrasonic motor deviceExpiredMar 02, 87Aug 16, 88[H01L]
4728843 Ultrasonic vibrator and drive control method thereofExpiredOct 22, 86Mar 01, 88[H01L]
4705980 Drive control method of ultrasonic vibratorExpiredSep 24, 86Nov 10, 87[H01L]
4703214 Ultrasonic vibrator and its drive control methodExpiredSep 30, 86Oct 27, 87[H01L]
4697117 Rotary ultrasonic motorExpiredNov 14, 86Sep 29, 87[H01L]
4671149 Method of perforating a texture to be sewnExpiredDec 20, 85Jun 09, 87[D06H, B26F]
4652786 Torsional vibration apparatusExpiredDec 03, 85Mar 24, 87[H01L]
4635483 Driving control method of ultrasonic transducerExpiredFeb 18, 86Jan 13, 87[G01N]
4620121 Piezoelectric apparatus for activating square plate resonatorExpiredDec 03, 85Oct 28, 86[H01L]
4577500 Driving control method of ultrasonic transducerExpiredAug 01, 84Mar 25, 86[G01N]
4562413 Driving frequency controlling method for an ultrasonic transducer driving apparatusExpiredJun 13, 83Dec 31, 85[H03B]
4524955 Burning tableExpiredJun 08, 84Jun 25, 85[B23K]
4483571 Ultrasonic processing deviceExpiredMay 05, 83Nov 20, 84[H01L]
4277758 Ultrasonic wave generating apparatus with voltage-controlled filterExpiredAug 09, 79Jul 07, 81[H03L]
4275363 Method of and apparatus for driving an ultrasonic transducer including a phase locked loop and a sweep circuitExpiredAug 09, 79Jun 23, 81[H03L, H01L, H03B]

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