Drilldown: Patents

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Patents > Office: DE & Tech fields : design or propulsion & Filing date: 1800 - 1899

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None (4) · Richard Czygan (3) · Ernst Georg August Baumgarten (3) · Raphael Ernst May (2) · Paul Nipkow (2)
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Showing below up to 56 results in range #1 to #56.

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