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All Patents in class 220/638 | |||||
Number | Date | Patentee | Title | Type | |
396,974 | Jan. 29, 1889 | E. Barrath | Coal-hod | ||
396,975 | Jan. 29, 1889 | E. Barrath | Coal-hod | ||
397,047 | Jan. 29, 1889 | E. Barrath | Coal-hod |