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Spirit-Level.

Description: Patent for a spirit level that is simple in construction and can easily determine vertical and horizontal planes accurately.
Date: March 13, 1906
Creator: Martin, Johann
Partner: UNT Libraries Government Documents Department

Eyeglasses

Description: Patent for "an improvement in eyeglasses; and it consists in certain novel constructions and combinations of parts" (lines 7-9), illustration and instructions included.
Date: March 13, 1900
Creator: Critzer, A. B.
Partner: UNT Libraries Government Documents Department

Wrench.

Description: Patent for "a wrench having a sliding jaw and a handle pivoted to the shank in such a manner that a movement of the handle about the work" prevents the jaw to move (lines 13-16).
Date: March 13, 1906
Creator: Garrard, William D.
Partner: UNT Libraries Government Documents Department

Wood-Boring Machine.

Description: Patent for a wood boring machine "which is especially adapted to bore holes of extreme length in columns or like structural members by cutting away only a portion of the wood forming hole in same" (lines 11-15).
Date: March 13, 1906
Creator: Bible, Hunley & Robinson, Lee A.
Partner: UNT Libraries Government Documents Department

Nut-Lock.

Description: Patent for a nut lock with a locking washer at the base of the nut that does not unscrew. The nut forms a bar of spring metal.
Date: March 13, 1894
Creator: Mauermann, Albert J.
Partner: UNT Libraries Government Documents Department