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Reference Publication — Antique Padlocks
The definitive reference documenting U.S. padlock patents from the earliest mechanical records through the twentieth century. Essential for collectors, researchers, and historians.
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The Padlock Patents Book is a comprehensive reference documenting U.S. padlock patents compiled from original USPTO records, supplemented by manufacturer research built over two decades of collecting and cataloguing.
Each entry includes the patent number, date, inventor, assignee, and a reproduction of the original patent drawings. Patents are cross-referenced to known production locks wherever possible.
Whether you are dating an unmarked lock, tracing a manufacturer’s design lineage, or need primary source citations for research or appraisal work, this is the reference that belongs beside your collection.
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A Note from David
Antique-Padlocks.com has been a free, ad-free resource since March 2001. Every sale directly helps cover hosting, storage, and the time it takes to keep expanding the archive. Thank you.
