UNT Libraries Government Documents Department - 20 Matching Results

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Description: Patent for an airship that is equipped with gas bags to control the ascent and descent of the airship and make it float in case of landing in the water.
Date: June 11, 1912
Creator: Bradshaw, John F. W.


Description: Patent for a foot trap for catching animals known for their furs that will prevent the animal from gnawing the trap or his foot off.
Date: May 9, 1911
Creator: Roberson, Elige L.


Description: Patent for a refrigerating machine compressor, which compresses more gas, cools the compressor with the incoming gas, and uses excess heat to dry the gas coming in.
Date: April 19, 1910
Creator: Mayhew, John Daugherty


Description: Patent for a device to provide a temporary cover to open graves made of non-rusting materials with adjustable length.
Date: September 19, 1912
Creator: Rankin, Daniel H. & Cox, William, E.