Resource Type

Land Bedder And Cultivator. (open access)

Land Bedder And Cultivator.

Patent for a new and useful land bedder and cultivator, including instructions and illustrations.
Date: August 9, 1898
Creator: Parker, Middleton N.
System: The Portal to Texas History
Engine-Valve. (open access)

Engine-Valve.

Patent for an engine valve for air brake systems on trains, which governs the pressure of air released and keeps it steady.
Date: August 9, 1910
Creator: Dillander, John
System: The Portal to Texas History