1
Philip O Isaacson, David W Gadtke, Vernon D Heidner, Neal F Nordling: Single channel pulse oximeter. Nonin Medical, Orrin M Haugen, Thomas J Nikolai, Frederick W Niebuhr, September 27, 1988: US04773422 (248 worldwide citation)

An electronic apparatus for sensing the percentage of different blood constituents in arterial blood. Light of a plurality of separate wave lengths is sequentially made to pass through a portion of the body, either by direct transmission or scattering so that the pulsatile blood flow modulates the i ...


2
Philip O Isaacson, David W Gadtke, Timothy L Johnson: Finger clip pulse oximeter. Nonin Medical, Vidas Arrett & Steinkraus, August 11, 1998: US05792052 (193 worldwide citation)

An apparatus for measuring a physical parameter, such as the saturation percentage of oxygen in blood. The pulse oximeter is built into the finger clip, and therefore the device is small, lightweight and very portable, as well as more reliable.


3
Philip O Isaacson, David W Gadtke: Offset pulse oximeter sensor. Nonin Medical, Palmatier Sjoquist Voigt & Christensen P A, September 1, 1998: US05800349 (192 worldwide citation)

In accordance with the present invention, a transmittance pulse oximeter sensor having an emitter that is offset from the detector. Offsetting the emitter and detector allows more light to pass through a thin tissue pulsating arterial bed than does a vertically aligned design. The offset between the ...


4
Philip O Isaacson, David W Gadtke, Timothy L Johnson: Finger clip pulse oximeter. Nonin Medical, Vidas Arrett & Steinkraus, February 13, 1996: US05490523 (190 worldwide citation)

The invention is directed to Apparatus for measuring a physical parameter, such as the saturation percentage of oxygen in blood. The pulse oximeter is built into the finger clip, and therefore the device is small, lightweight and very portable, as well as more reliable.


5
Thomas R Coulter, Philip O Isaacson, Edwin C Thiede: High resolution noncoherent radar imager. Honeywell, Orrin M Haugen, Thomas J Nikolai, Frederick W Niebuhr, November 17, 1987: US04707697 (33 worldwide citation)

In accordance with a first arrangement, a non-coherent, pulse radar transmitter emits N-sequential signals of differing frequencies at predetermined time intervals, the transmitted pulses being directed toward a given target area of interest. Further included is a radar receiver for detecting and pr ...


6
Douglas R Maser, Timothy L Johnson, Philip O Isaacson: Sensor assembly. Nonin Medical, Fulbright & Jaworski L, April 15, 2008: US07359742 (22 worldwide citation)

A flexible finger sensor having a finger entrance, a sensor holder at a distal end of the assembly, and a fenestrated region disposed between the finger entrance and the sensor holder. A displacement resistant finger sensor and method of use for reducing motion-related artifacts by mechanical isolat ...


7
Philip O Isaacson, Timothy L Johnson, Joe Raymond Crackel: Sensor system with memory and method of using same. Nonin Medical, Fulbright & Jaworski L, June 24, 2008: US07392074 (18 worldwide citation)

A method of using an oximeter sensor assembly including the steps of detecting light from a light emitting element and storing digital data in a memory associated with the sensor assembly. The stored digital data includes coefficients for use by an oximeter monitor coupled to the sensor assembly to ...


8
Philip O Isaacson: Tocodynamometer. Aequitron Medical, Paul L Sjoquist, February 3, 1987: US04640295 (17 worldwide citation)

A tocodynamometer for measuring intra-amniotic pressure through the abdominal wall of obstetric patients, including a force transducer resiliently mounted in a housing, a precompressed coil spring between the housing and an outer backplate, and an attachment on the outer backplate for fastening ther ...


9
Philip O Isaacson, David W Gadtke, Vernon D Heidner, Neal F Nordling: Pulse oximeter with circuit leakage and ambient light compensation. Nonin Medical, Haugen and Nikolai, July 23, 1991: USRE033643 (11 worldwide citation)

An electronic apparatus for sensing the percentage of different blood constituents in arterial blood. Light of a plurality of separate wave lengths is sequentially made to pass through a portion of the body, either by direct transmission or scattering so that the pulsatile blood flow modulates the i ...


10
Philip O Isaacson: Optical sensor path selection. Nonin Medical, Schwegman Lundberg & Woessner P A, May 13, 2014: US08725226 (7 worldwide citation)

A device includes a sensor for measuring a parameter for tissue. The sensor includes a plurality of optical elements including a plurality of detectors and at least one emitter. Separation distances between the various optical elements are selected based on a depth corresponding to a region of inter ...