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Patents for Dwight F. Walker | |||||
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Number | Date | Patentee | Title | Type | |
117,020 | Jul. 11, 1871 | D.F. Walker | Improvement in paneling-machines | panel cutting machines | |
120,405 | Oct. 31, 1871 | D.F. Walker | Improvement in panel-raising machines | panel raising machines | |
491,789 | Feb. 14, 1893 | D.F. Walker | Grindstone, emery-wheel, &c. | grinding wheels | |
510,742 | Dec. 12, 1893 | D.F. Walker | Paper holder and cutters | ||
541,192 | Jun. 18, 1895 | D.F. Walker | Paper-roll holder | ||
544,016 | Aug. 06, 1895 | D.F. Walker | Attachment for paper-holding stands |