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    • Format Videos, Slides, Films
    • Author produced by Signature for the U.S. Patent and Trademark Office ; executive producer, Richard Maulsby ; producer/writer, Ruth Nybold ; director, Clifton R. Witt
    • Date [1998?]
    • Availability
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    • Format Videos, Slides, Films
    • Author produced by Signature Communications for the U.S. Department of Commerce, Patent and Trademark Office
    • Date [1997?]
    • Availability
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    • Format Videos, Slides, Films
    • Author produced by Signature Communications for the U.S. Department of Commerce, Patent and Trademark Office
    • Date [1997?]
    • Availability
      • Just a moment... Looking up availability.