Combination Door Check and Alarm.
Creation Information
Context
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patent as a primary source within our collections. Researchers, educators, and students may find this patent useful in their work.
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Subjects
Mapped Locations
Combination Door Check and Alarm., patent, February 12, 1889; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth171970/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.