Patents by Inventor Lennart P. E. Persson

Lennart P. E. Persson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4349958
    Abstract: The invention relates to a device for temperature measurements, comprising a temperature-sensitive sensor whose electrical properties, e.g. resistance, vary with the temperature, e.g. a thermistor, and which via two contacts is connected to two electric conductors arranged on a support, which electric conductors in turn can be connected to a reading unit for the reading of the actual values of current, voltage or the like corresponding to the temperature.In a preferred embodiment the said electric conductors are in the form of two metal layers on both sides of a support made of plastics. The one metal layer is interrupted by a gap which is arranged to be bridged by the sensor, one contact of which is connected to each conductor.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: September 21, 1982
    Assignee: Gambro AB
    Inventors: Hakan B. Hakansson, Lennart P. E. Persson, Berth-Ove G. Wall
  • Patent number: 4296633
    Abstract: The invention relates to a device for temperature measurements, comprising a temperature-sensitive sensor whose electrical properties, e.g. resistance, vary with the temperature, e.g. a thermistor, and which via two contacts is connected to two electric conductors arranged on a support, which electric conductors in turn can be connected to a reading unit for the reading of the actual values of current, voltage or the like corresponding to the temperature.In a preferred embodiment the said electric conductors are in the form of two metal layers on both sides of a support made of plastics. The one metal layer is interrupted by a gap which is arranged to be bridged by the sensor, one contact of which is connected to each conductor.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: October 27, 1981
    Assignee: Gambro AB
    Inventors: Hakan B. Hakansson, Lennart P. E. Persson, Berth-Ove G. Wall
  • Patent number: 4253334
    Abstract: PCT No. PCT/SE78/00013 Sec. 371 Date Mar. 3, 1980 Sec. 102(e) Date June 1, 1979 PCT Filed July 3, 1978 PCT Pub. No. WO80/00192 PCT Pub. Date Feb. 7, 1980The invention relates to a device for the gripping of a temperature measuring device and for the reading of measuring values obtained with this device. The said temperature measuring device comprises a temperature-sensitive sensor, whose electrical properties, e.g. the resistance, vary with the temperature, e.g. a thermistor, and which is connected via two contacts to two electric conductors arranged on a support, which electric conductors terminate in two contact surfaces at the end remote from the sensor.An arrangement in accordance with the invention is intended mainly to be used for medical temperature measuring, characterized by at least two measuring contact surfaces which can be coupled together with the said contact surfaces, arranged on the inside or insides of the jaws or a tonglike construction.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: March 3, 1981
    Assignee: Gambro AB
    Inventors: Hakan B. Hakansson, Lennart P. E. Persson
  • Patent number: D256893
    Type: Grant
    Filed: January 3, 1979
    Date of Patent: September 16, 1980
    Assignee: Gambro AB
    Inventors: Bengt Nestell, Lennart P. E. Persson