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| Number | Title | Issue Date |
| 4606490 | Apparatus and method for automatic evaluation of a bond created by an ultrasonic transducer Apparatus and method for determining if a lead bond created by an ultrasonic transducer has the characteristics of a good bond. The current supplied to the transducer is monitored and the envelope of the supplied current is sampled periodically and suppli... | 08/19/1986 |