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Spring-Latch.

Description: Patent for certain new and useful improvements in spring latches, including instructions and illustrations.
Date: November 7, 1899
Creator: Dockery, Allen B.
Partner: UNT Libraries Government Documents Department

Door-Holder.

Description: Patent for a door holder, which will hold the door in place at various preset positions.
Date: December 7, 1909
Creator: Daly, Henry M.
Partner: UNT Libraries Government Documents Department

Automatic Elevator Gate

Description: Patent for an elevator gate that will automatically be raised or lowered upon ascent or descent of the elevator, with illustrations.
Date: October 7, 1902
Creator: McNaught, Ira S.
Partner: UNT Libraries Government Documents Department