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Patent US 3617881A: Difference between revisions
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|Title=Dc voltage-testing and current-measuring circuit including differential amplifier | |Title=Dc voltage-testing and current-measuring circuit including differential amplifier | ||
|Company=Tektronix Inc | |Company=Tektronix Inc | ||
|Inventors=John | |Inventors=John McCormick | ||
|Filing date=1969-11-24 | |Filing date=1969-11-24 | ||
|Grant date=1971-11-02 | |Grant date=1971-11-02 | ||
}} | }} | ||