1
Kenji Hamaguri, Takao Sakai: Multi-wavelength oximeter having a means for disregarding a poor signal. Minolta Camera Kabushiki Kaisha, Price Gess & Ubell, December 22, 1987: US04714341 (353 worldwide citation)

An oximeter for measuring oxygen saturation in arterial blood includes a light source for projecting light to a body member to be measured, a light responsive circuit for receiving the light which has transmitted through said body member and for generating at least first, second and third signals at ...


2
Takao Sakai, Kenji Hamaguri: Device for measuring oxygen saturation degree in arterial blood. Minolta Camera Kabushiki Kaisha, Price Gess & Ubell, July 24, 1990: US04942877 (308 worldwide citation)

An improved oximeter device for the calculation of oxygen saturation in arterial blood is provided. A pair of LED's are positioned to transmit red and infrared light through tissue containing the blood. A photo electric converter is provided to receive the transmitted light and convert it into a ele ...


3
Kenji Hamaguri: Noninvasive device for photoelectrically measuring the property of arterial blood. Minolta Camera Kabushiki Kaisha, Price Gess Ubell, May 6, 1986: US04586513 (207 worldwide citation)

A noninvasive device for photoelectrically measuring a property of arterial blood is provided. Light that contacts living tissue with arterial blood is converted into a pair of electrical signals. The electrical signals are processed to provide information of the amplitude of the measured signals an ...


4
Kenji Hamaguri: Digital oximeter. Minolta Camera Kabushiki Kaisha, Jackson Jones & Price, May 12, 1981: US04266554 (188 worldwide citation)

A digital oximeter for noninvasively measuring oxygen saturation of the arterial blood is provided. Photoelectric transducers measure the light intensity after passing through living tissue to produce at least a pair of output signals of different wavelengths of light. A sample hold circuit is provi ...


5
Kenji Hamaguri: Noninvasive device for photoelectrically measuring the property of arterial blood. Minolta Camera Kabushiki Kaisha, Price Gess & Ubell, September 22, 1987: US04694833 (182 worldwide citation)

A noninvasive device for photoelectrically measuring a property of arterial blood is provided. Light that contacts living tissue with arterial blood is converted into a pair of electrical signals. The electrical signals are processed to provide information of the amplitude of the measured signals an ...


6
Akio Yamanishi, Kenji Hamaguri: Respiration diagnosis apparatus. Minolta, Price Gess & Ubell, January 31, 1995: US05385144 (91 worldwide citation)

The object of this invention is to provide an extremely simple device to extract information to distinguish between obstructive apnea and central apnea and which performs this operation automatically based on the extracted information.


7
Takao Sakai, Kenji Hamaguri: Apnea detector. Minolta Camera Kabushiki Kaisha, Price Gess & Ubell, August 23, 1988: US04765340 (70 worldwide citation)

A medical apparatus for detecting apnea, in particular, in infants and children. The apparatus measures oxygen saturation in the blood and relates the measurement to a normal condition. The relationship is employed to indicate apnea.


8
Kenji Hamaguri: Display characteristic measurement apparatus for a color display apparatus, and a method for calibrating the same. Minolta, McDermott Will & Emery, October 8, 2002: US06462777 (14 worldwide citation)

A color display characteristic measurement apparatus is provided with a first image pickup device for picking up an image of a first color component, a second image pickup device for picking up an image of a second color component, a measurement image generator for causing a color display apparatus ...


9
Hiroshi Kohsaka, Masakazu Nakanishi, Toshio Miyashita, Isamu Nakajima, Yuji Takumiya, Kenji Hamaguri, Hiroaki Iio: Infrared image pick-up apparatus. Minolta Camera Kabushiki Kaisha, Price Gess & Ubell, October 27, 1992: US05159198 (10 worldwide citation)

An infrared image pick-up apparatus includes: a body having a condenser lens for condensing an infrared ray emitted from an object, a sensor for detecting intensity of the condensed ray and generating an electric signal corresponding to the intensity, a signal processing circuit for processing the s ...


10
Kenji Hamaguri, Shinji Shimizu: Device for measuring a glow center of a display device. Minolta, Burns Doane Swecker & Mathis, November 10, 1998: US05835135 (7 worldwide citation)

A measuring device for measuring a glow center of a display device is provided with: an image pickup device which includes a sensing surface defined by a plurality of photoelectric conversion elements arranged in a two-dimensional manner at a specified pitch and picks up a light image to produce ima ...