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US3873859A
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Ultrasonic welding tool
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US3893223A
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High frequency vibratory spot welding of sheet metal
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Vibratory welding apparatus
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Sonic or ultrasonic apparatus
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US3852144A
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Ultrasonic seaming and cutting apparatus
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US3833163A
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Ultrasonic apparatus
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US3790059A
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Ultrasonic apparatus
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US3813006A
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Replaceable welding tip for vibratory welding apparatus
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US3813021A
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Electronic safety control circuit
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US3791569A
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Vibratory welding apparatus
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Failure detection circuit for ultrasonic apparatus
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US3785910A
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Ultrasonic seaming apparatus including feed means
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Ultrasonic seaming apparatus
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US3752381A
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Ultrasonic soldering apparatus
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US3752380A
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Vibratory welding apparatus
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Method of welding together two thermoplastic workpieces by high frequency vibratory energy
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Ultrasonic treatment apparatus
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Apparatus for exposing sheet material to ultrasonic energy
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Oscillatory circuit for ultrasonic cleaning apparatus
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US3701941A
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Magnetic anomaly detector with means for obtaining different test frequencies
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