Roller Bearing (open access)

Roller Bearing

Patent for improvement on roller bearings that include spaced rings and multiple rollers.
Date: November 2, 1911
Creator: Tatum, Franklin M.
System: The Portal to Texas History
Flexible Joint (open access)

Flexible Joint

Patent for a flexible joint provides "an improved and simplified device that is simple, durable and reliable in construction and effective and efficient in operation" (lines 10-13).
Date: November 16, 1915
Creator: Mooney, Thomas H.
System: The Portal to Texas History
Range-Finder For Small-Arms. (open access)

Range-Finder For Small-Arms.

Patent for an improved Range-Finder for Small-Arms at an inexpensive price which can be attached at any rifle specifically designed and used in the United States Army.
Date: November 24, 1914
Creator: Guild, George R.
System: The Portal to Texas History