Click on image to zoom

Historical German Patents & Torsion Pendulum Clocks

This compendium of German DRP patents is the work of Doug Stevenson who made a number of outstanding contributions to the discovery of new information concerning makers & production of torsion-pendulum clocks. 28 DRP patents are reproduced in their entirety with many pictures of the items to be patented. The Timely Memories book (#34400) is dedicated to Doug’s memory. 120 pages.
Pricing: $20.00


  • 34404
  • 34404
  • New


Shipping Information

  • Item Requires Shipping

Copyright © 2012 Timesavers. All Rights Reserved. Site Developed by

Blacart Creative Group