grinding machine patent by peter herzig swiss
grinding machine patent by peter herzig swiss USAMethod of making a musical combGoogle USA US470219A USA USA US A US A US A US 470219 A US470219 A US 470219A US A US A US A US A US A US A Authority US United States Prior art keywords comb die blank base musical Prior art date Legal status (The legal status is an assumption and is not a legal ...
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