What does "DRP USA PAT" mean?

Thread: What does "DRP USA PAT" mean?

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  1. #1
    Member AbslomRob's Avatar
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    Jun 2009
    Ottawa, Ontario, Canada, Canada

    What does "DRP USA PAT" mean?

    I'm in the process of cleaning up a nice Hafis 25j watch with a Felsa 692 movement (http://www.ranfft.de/cgi-bin/bidfun-...uswk&Felsa_692), and I found that stamped on the dial-side of the pillar plate. Ranft lists a number of watches by "Sully" that have a similar stamp (also Felsa's, but different calibers), so I'm not sure if its related to the Felsa rotor patent, or something else. Mine's a Hafis (which was a brand of F. Suter & Cie). Anyone know?
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    Last edited by AbslomRob; June 11th, 2010 at 13:04.
    My growing collection of "affordable" vintages: http://www.abslomrob.com

  2. #2
    Member rmelle's Avatar
    Join Date
    Feb 2010

    Re: What does "DRP USA PAT" mean?

    DRP means: Deutsches Reichs Patent.
    The German equivalent of USA Patent.
    So this pattent was a DRP and a USA patent.

    RJ van Melle.

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