Patents -- United States
Subject
Subject Source: Library Of Congress Subject Headings
Found in 1 Collection or Record:
Henry Clay Preston journals
Collection
Identifier: 2007-044-LIB
Abstract
This collection contains the personal financial journals of Henry Clay Preston, 1917-1957 (3 volumes). The collection also includes Clay's marriage certificate and patents for machine tools invented or improvements by Preston.
Dates:
1917 - 1957