Resource Type
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Compound Engine.
Patent for certain new and useful improvements in compound engines, including instructions and illustrations.
Date:
June 20, 1899
Creator:
Johnson, Willie H.
System:
The Portal to Texas History
Suspension-Bridge
Patent for improvements in suspension bridges "to increase the strength of the same and reduce the n-umber of parts and simplify the general construction of the same" (lines 10-12).
Date:
May 20, 1890
Creator:
Hill, James Oliver
System:
The Portal to Texas History