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US847198.pdf (file size: 192 KB, MIME type: application/pdf)

Patent No. 847,198. "Rocket Apparatus"; granted to Alfred Maul, of Dresden, Germany.

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current22:43, 1 April 2020 (192 KB)RobertG (Talk | contribs) (Patent No. 847,198. "Rocket Apparatus"; granted to Alfred Maul, of Dresden, Germany.)

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