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Patents > National tech categories : DE 77h or USPC 244/30 & Citations from after 1930: None

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None (5) · Firmin Bousson (3) · Caspar Braun (3) · August Riedinger (3) · Emil Lehmann (3) · François Hennebique (2) · Heinrich Suter (2) · Stewart Cairncross (2) · Andreas Ożegowski (2) · Stanislaus Victor Saloni (2) · August Euler (2)
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None (55) · Firmin Bousson (3) · Andreas Ożegowski (2) · Emil Lehmann (2) · August Riedinger (2) · August Euler (2)
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