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All Patents in class 222/134 | |||||
Number | Date | Patentee | Title | Type | |
1,510,439 | Sep. 30, 1924 | E.R. Draver | Transmission mechanism for feeders connected in a gang | ||
1,521,014 | Dec. 30, 1924 | E.R. Draver | Regulating device for percentage feeders |