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Caddo Lake State Park
Map of the Caddo Lake State Park outlining hiking trails and highlighting activities, facilities, and other features such as bathrooms, lodgings, water/electric, etc. It also contains general information for the park and for the Texas Parks and Wildlife Department.
Date:
February 2012
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Map
System:
The Portal to Texas History
Oxygen-Generator
Patent for an oxygen generator that refills as it is emptied.
Date:
February 7, 1911
Creator:
Bradley, Richard Clinton
Object Type:
Patent
System:
The Portal to Texas History
Pipe-Wrench.
Patent for improvements to pipe wrenches to a more simple design.
Date:
February 16, 1915
Creator:
Lewis, Guy V.
Object Type:
Patent
System:
The Portal to Texas History