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Patent for self adjusting sewer scraper, 1885. Patented by Michael Fitzsimons on October 27, 1885. U.S. Patent No. 329,034, pp[removed]Source: United States Patent and Trademark Office at http://www.uspto.gov.
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Document Date: 2004-05-17 12:00:28
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Patent for self adjusting sewer scraper, 1885. Patented by Michael Fitzsimons on October 27, 1885. U.S. Patent No. 329,034, pp[removed]Source: United States Patent and Trademark Office at http://www.uspto.gov.