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John James Thompson
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Individual
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19,509. Thompson, J. J. Sept. 27. Flooring-blocks.-A floor is formed of blocks resting on joists and projecting beneath the full width of the lower joist flanges, the edges of the projecting portions being bevelled, and with or without a tongue and-groove joint, as shown in Figs. 2 and 4. Specifications No. 14,963, A.D. 1889, No. 13,645, A.D. 1899, and No. 12,708, A.D. 1904, are referred to.