Drilldown: Patents

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Patents > Tech fields : navigation or propulsion & National tech categories : AT 77d or USPC 244/30

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None (8) · Stewart Cairncross (2) · Franz Xaver Wels (2) · Paul Frederik Degn (2) · Albert Livingstone Blackman (2)
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None (30) · Franz Xaver Wels (2) · Paul Frederik Degn (2) · Albert Livingstone Blackman (2)
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Showing below up to 93 results in range #1 to #93.

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