Definitions of Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office (Classic Reprint): Arranged in Numerical ... Revised to January 1, 1912 (Classic Reprint) - Softcover

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Excerpt from Definitions of Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office

For features of staple setting and riveting machines, search should also be made in the various subclasses in class 218, button, eyelet, and rivet setting. For features of shoe nailing, search should include the combined machines for nailing, lasting, trimming, etc., under class 12, boot and shoe making.

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