Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
G01N9/30—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by using centrifugal effects
Verfahren zur Ausfuehrung von Multiplikationen und Divisionen von Groessen durch Addition bzw. Subtraktion von logarithmisch bemessenen elektrischen Groessen
Verfahren zur Messung von Gleichspannungen, die durch einen rotierenden Kondensator in Wechselspannung umgeformt und einem Roehrenverstaerker zugefuehrt werden