Drilldown: Patents

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Patents > Tech fields: instrument & Filing date: 1910 - 1919 & Number of text pages: 1-2

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None (6) · Floris Albert van Heyst (2) · Pierre Poulalion (2) · Otto E. Lindpaintner (2) · Nicolaas Everhard Groeneveld Meyer (2) · Louis-Isidore Henry (2) · Jean Armange (2) · Wolfgang Kreuter (2)
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