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Patents for John A. Roberts
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,792,208May 14, 1957J.A. Roberts, J.C. MerrillControl Provision for Recording Mechanismscales and balances
2,864,605Dec. 16, 1958J.A. Roberts, M.T. ThorssonAutomatic Range Changer with Weight Pick-Upscales and balances
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