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US79963.pdf (file size: 197 KB, MIME type: application/pdf)

Patent No. 79,963. “Improvement in Rocket Signal Device"; granted to Jacob J. Detwiller, of Greenville, N. 1.

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current22:43, 1 April 2020 (197 KB)RobertG (Talk | contribs) (Patent No. 79,963. “Improvement in Rocket Signal Device"; granted to Jacob J. Detwiller, of Greenville, N. 1.)

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