Research Catalog

  • Linear encoding device [microform] / inventor, Douglas B. Leviton.

    • Text
    • [Washington, DC : National Aeronautics and Space Administration, 1993]
    • 1993
  • Rotary encoding device [microform] : patent application / [inventor, Douglas B. Leviton].

    • Text
    • [Washington, DC : National Aeronautics and Space Administration ; Springfield, Va. : National Technical Information Service, distributor, 1993]
    • 1993

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