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Improvement in Vehicle-Springs

Description: Patent for a newly designed vehicle spring that attached to the axle and features an auxiliary spring.
Date: May 22, 1877
Creator: Faber, Fredrick W.
Partner: UNT Libraries Government Documents Department

Improvement in Revolving Conical Mold-Boards

Description: Patent for improvements and new design for a Revolving Conical Mold-Board Plow.
Date: May 22, 1877
Creator: Dryer, Charles Valentine
Partner: UNT Libraries Government Documents Department

Improvement in Car-Couplings

Description: Patent for car coupling device that attaches cars automatically when moved together while also detaching if one or more cars come off the tracks.
Date: May 22, 1877
Creator: Dobbs, Charles & Robinson, Samuel L.
Partner: UNT Libraries Government Documents Department
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