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Patents

 Subject
Subject Source: Library of Congress Subject Headings

Found in 1 Collection or Record:

John R. Simpson papers

 Collection
Identifier: L144
Scope and Contents This collection includes autographed, signed letters and business correspondence from John R. Simpson and his family and friends in Paoli, Indiana and elsewhere ranging from 1822 to 1875 regarding family matters, patents, and land grants.
Dates: 1822-1875