Historical German patents & torsion pendulum clocks. part I, DRPS 1877-1945 / D.K. Stevenson.

By: Material type: TextTextPublisher: Essen, Germany : Ruhrei Verlag, [2002]Description: 138 pages ; 30 cmContent type:
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Other title:
  • Historical German patents and torsion pendulum clocks. part I, DRPS 1877-1945
Subject(s):

31560000064705 2205

a complete set of the German patents (DRP) 1877-1945 relating to the Torsion Pendulum clocks

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