Patents by Inventor Ulf Elman

Ulf Elman 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).

  • Device, method and system for determining the road surface condition
    Patent number: 7224453
    Abstract: The invention relates to a device, a method and a system for determining a road surface condition, where the surface condition is one of dry, wet or icy. The device comprises a reflectance spectrometer which senses the reflectance properties of the road at one or several wavelengths and uses these reflectance properties to determine the surface condition. The reflectance spectrometer is a wavelength modulation spectrometer, preferably for the near infrared region. The system determines the surface condition and indicates it to a user of the system.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: May 29, 2007
    Inventor: Ulf Elman
  • Device, method and system for determining the road surface condition
    Publication number: 20060050270
    Abstract: The invention relates to a device, a method and a system for determining a road surface condition, where the surface condition is one of dry, wet or icy. The device comprises a reflectance spectrometer which senses the reflectance properties of the road at one or several wavelengths and uses these reflectance properties to determine the surface condition. The reflectance spectrometer is a wavelength modulation spectrometer, preferably for the near infrared region. The system determines the surface condition and indicates it to a user of the system.
    Type: Application
    Filed: October 9, 2003
    Publication date: March 9, 2006
    Inventor: Ulf Elman