Frederick Merk Ryan

Method and apparatus for the detection and measurement of gases

Method and apparatus for remotely and portably measuring a gas of interest

Method and arrangement for measuring the optical absorptions of gaseous mixtures

An improved method and arrangement for measuring the optical absorptions of gaseous mixtures

Acousto-optic tunable filter with two acoustic channels

Improved automated acousto-optic infra-red analyzer system for monotoring stack emissions

Verfahren und Vorrichtung zur Messung der optischen Absorption von Gasgemischen

Verfahren und tragbarer Apparat zur Bestimmung eines Gases aus der Ferne. Method and apparatus for determining a portable gas from a distance.

Verfahren und Vorrichtung zur Messung der optischen Absorption von Gasgemischen Method and apparatus for measuring the optical absorption of the gas mixtures

Method and apparatus for measuring the optical absorption of gas mixtures