1
Eric N Johnson: Blood constituent monitoring apparatus and methods with frequency division multiplexing. The BOC Group, Roger M Rathbun, Larry R Cassett, January 31, 1989: US04800885 (230 worldwide citation)

Apparatus and method for measuring the level of a constituent such as oxygen in the blood of a living subject. Light at a plurality of wavelengths is emitted and directed through the patient's body to a photodetector. The amplitude of the emitted light at each wavelength is varied in accordance with ...


2
Arthur I Shirley, Ramakrishnam Ramachandran: Method of recovery of natural gases from underground coal formations. The BOC Group, Coleman R Reap, Larry R Cassett, July 26, 1994: US05332036 (213 worldwide citation)

Methane is produced from a coal seam penetrated by an injection well and a gas production well by first introducing liquefied or gaseous carbon dioxide through the injection well and into the coal seam and subsequently introducing a weakly adsorbable gas through the injection well and into the coal ...


3
Alan D Martin: Blood parameter monitoring apparatus and methods. The BOC Group, Larry R Cassett, Roger M Rathbun, July 11, 1989: US04846183 (200 worldwide citation)

A pulse oximeter or plethysmographic device utilizes light varying in intensity at a predetermined carrier frequency. A passive resonant circuit having a resonant frequency substantially equal to the carrier frequency is connected between the photodetector and the first amplifier. The resonant circu ...


4
John Lehan, Henry Byorum, Russell J Hill, J Kirkwood Rough: Sputtering system using cylindrical rotating magnetron electrically powered using alternating current. The Boc Group, David A Draegert, Salvatore P Pace, September 29, 1998: US05814195 (186 worldwide citation)

A sputtering system using an AC power supply in the range of 10 kHz to 100 kHz uses two rotatable cylindrical magnetrons. The rotatable cylindrical magnetrons, when used for depositing a dielectric layer onto a substrate, clean off dielectric material that is deposited onto the target. This prevents ...


5
Alan D Martin: Blood monitoring apparatus and methods with amplifier input dark current correction. The BOC Group, Larry R Cassett, Roger M Rathbun, November 1, 1988: US04781195 (185 worldwide citation)

In photoelectric apparatus such as a pulse oximeter for monitoring a parameter of the blood in a living organism, a dark current correction signal is applied to the input at the preamplifier. The correction signal is substantially equal in magnitude but opposite in sense to the photodetector output ...


6
Robert A Nichols, David R Tobler: Probe monitoring system for oximeter. The BOC Group, Roger M Rathbun, Larry R Cassett, August 5, 1986: US04603700 (158 worldwide citation)

A monitor system for an oximeter that sequentially tests the operative conditions of light emitting devices of the oximeter, the light detector of the oximeter, and the reference voltage of the oximeter. Data processing means is responsive to the determined test values for indicating the occurrence ...


7
Ronald L Tobia, Russell J Fischer, Robert T Chilcoat: Medical ventilator. The BOC Group, Roger M Rathbun, Larry R Cassett, Arnold Dompieri, April 19, 1994: US05303698 (108 worldwide citation)

A medical ventilator is provided for providing continuous, closed-loop control of the pressure of gas within a patient's mouth or respiratory tract in accordance with any selected pressure input waveform. The medical ventilator comprises an adaptive, feedback controller which provides independent co ...


8
Jesse D Wolfe, Abraham I Belkind, Ronald E Laird: Durable low-emissivity solar control thin film coating. The BOC Group, David A Draegert, Salvatore P Pace, October 8, 1996: US05563734 (107 worldwide citation)

An infrared reflecting interference filter capable of transmitting a desired proportion of visible radiation while reflecting a large portion of incident solar radiation is provided. The filter comprises a transparent substrate onto which is deposited a dielectric layer, followed by metal and dielec ...


9
Fredrick J Montgomery: Anesthetic vaporizers. The BOC Group, Roger M Rathbun, Larry R Cassett, September 15, 1992: US05146915 (107 worldwide citation)

An anesthetic vaporizer 1 for use particularly with anesthetic agents having a low boiling point comprises an inlet 2 for carrier gas an an outlet 4 for carrier gas and gaseous anesthetic agents. A first passage 6 extends between the inlet 2 and the outlet 4. A flow restrictor 8 is located within th ...


10
David J Thwaites: Anaesthetic vaporizer. The BOC Group, Roger M Rathbun, Larry R Cassett, R Hain Swope, January 14, 1997: US05592934 (105 worldwide citation)

An anesthetic vaporizer is disclosed having an inlet for receiving carrier gas and an outlet for delivering carrier gas with an anesthetic agent to a patient. The vaporizer has a passage that extends between the inlet and the outlet, a vaporizing chamber and a passageway extending from the vaporizin ...