Slide rule workshop B

Nathan's second mystery slide rule.

“Pose-Marré” pen slide rule

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Data:

  • Article on Nathan Zeldes site: Pose-Marre.
  • We have the “Gebrauchsmuster,” issued to Karl Opdenhövel.
    A Gebrauchsmuster is a Utility Patent, which is cheaper and shorter-lived than a ‘full’ patent. T This one is written in the style of a real patent application. Karl Kleine
    There is no other patent applications by the same Karl Opdenhövel. Karl Kleine

Questions:

  1. More info?
  2. Who manufactured it?
    The workmanship indicates a “Meisterstück”, demonstration model, or the like. Karl Kleine
    However, there is one other specimen sighted on eBay marked “EUROFORM Dr. Ing. Regehr KG” rather than “Pose-Marre”. Nathan Zeldes
    EUROFORM / Ulrich Regehr, from Aachen, have patents in the field of liquid gas separation, e.g. DE 2,044,746 and CA 1,010,381.
    Note that the Essen-based patent attorneys for the German EUROFORM patent are the same as those for the slide rule Gebrauchsmuster. Andries de Man