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in subjects: "thermometers"  
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Pyrometer.

Description: Patent for a new and useful pyrometers "in which the motive power is a column of metallic balls of high expansive quality inclosed in a metallic tube of less expansive power" (line 9 - 12).
Date: November 21, 1899
Creator: Von Koehring, Henry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Oven-Thermometer

Description: Patent for "an instrument for indicating the temperature of an oven, so that the fire may be regulated to secure the required temperature for any particular article" (lines 21-25).
Date: May 21, 1889
Creator: Voss, John C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Clinical Thermometer.

Description: Patent for a new and improved thermometer. This design has "[u]pon the body of the instrument a scale, preferably equivalent to the centigrade . . . in which the zero-sign is placed at the normal temperature of the body, each degree being divided into five or ten parts according to the size of the instrument and reading supernormal and subnormal degrees" (lines 20-26).
Date: June 11, 1889
Creator: Hunstock, Robert H. & Chávez, Emigdio
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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