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Hasp and staple lock

Patent drawing showing a rectangular jointed metal frame fastener for a mail bag, with hinged rings at the corners, a pivoted lever, hasp, and bolt mechanism shown in back, top, and front views.

IMPROVEMENT IN MAIL-BAG FASTENINGSD. Franklin Dodge · February 7, 1871

United States patent drawings and specifications are works of the U.S. government and are in the public domain — they were never copyrighted. Download them, print them, frame them. Our commentary and descriptions are © 2026 The Duck & Game Call Patent Archive.

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