Titles published by Ruhrei:
Number of documents found: 3
- Douglas K. Stevenson
Title: Historical German Patents & Torsion Pendulum Clocks, Part 1
SubTitle: DRPs 1877-1945
Keywords: patent
Other Keywords: torsion
Edition: 2002, 1st edition
Page or pages: 138
BHM No: 2205 - Douglas K. Stevenson
Title: Patent Nachrichten - Band 1 1877-1910
SubTitle: Patent Listings in the Deutsche Uhrmacher Zeitung
Keywords: patent
Edition: 2003, 1st edition
Page or pages: 382
BHM No: 1899 - Douglas K. Stevenson
Title: Patent Nachrichten - Band 2 1910-1932
SubTitle: Patent Listings in the Deutsche Uhrmacher Zeitung
Keywords: patent
Edition: 2003, 1st edition
Page or pages: 376
BHM No: 5001
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