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ExxonMobil Upstream Research Co
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Exxon Production Research Co
Esso Production Research Co
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Priority to ES367546ApriorityCriticalpatent/ES367546A3/es
Publication of ES367546A3publicationCriticalpatent/ES367546A3/es
Sistema con su dispositivo comparador para la discrimina- cion de frecuencia y la medida de la diferencia de fase en- tre dos senales electricas alternadas.
Automation of a rotatable compression manometer(Combination flow-pressure measuring instrument based on rotating Flosdorf manometer with switching relay system)
Dispositivo para la transmision a distancia y el registro dela indicacion de un cabezal medidor circular de aguja, pre- ferentemente de una bascula automatica.