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Find number abc

If acc8b - a0408 = cabc find number abc. Multiple solutions may exist.

Correct answers: 1

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Edison patent

In 1909, a U.S. patent for "Waterproofing Paint for Portland Cement Buildings" was issued to Thomas A. Edison (No. 909,167) and another for "Waterproofing Paint for Portland Cement Structure" (No. 909,169). He also received a patent for "Waterproofing Fibers and Fabrics" (No. 909,806).

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