Patents by Inventor Per Anders Davidsson

Per Anders Davidsson 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).

  • Low noise, towed electromagnetic system for subsurface exploration
    Patent number: 7737698
    Abstract: A detector for a marine electromagnetic survey system includes a housing arranged to minimize turbulence when the housing is towed through a body of water, and to minimize motion of the housing in any direction other than the tow direction. The housing includes at least one of an electric field and a magnetic field sensing element associated therewith.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: June 15, 2010
    Assignee: PGS Geophysical AS
    Inventors: Stig Rune Lennart Tenghamn, Rune Johan Magnus Mattsson, Peter Gunnar Krylstedt, Mattias Fredrik Karlsson, Ulf Peter Lindqvist, Per Anders Davidsson
  • Cable-type electromagnetic receiver system for subsurface exploration
    Patent number: 7602191
    Abstract: A marine electromagnetic survey cable includes a reference electrode extending substantially along the entire length of the cable. A plurality of spaced apart measuring electrodes is disposed along the cable and each is electrically insulated from the reference electrode. A voltage measuring is circuit functionally coupled between each measuring electrode and the reference electrode.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: October 13, 2009
    Assignee: PGS Geophysical AS
    Inventor: Per Anders Davidsson
  • Cable-type electromagnetic receiver system for subsurface exploration
    Publication number: 20090001987
    Abstract: A marine electromagnetic survey cable includes a reference electrode extending substantially along the entire length of the cable. A plurality of spaced apart measuring electrodes is disposed along the cable and each is electrically insulated from the reference electrode. A voltage measuring is circuit functionally coupled between each measuring electrode and the reference electrode.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventor: Per Anders Davidsson
  • Low noise, towed electromagnetic system for subsurface exploration
    Publication number: 20070229083
    Abstract: A detector for a marine electromagnetic survey system includes a housing arranged to minimize turbulence when the housing is towed through a body of water, and to minimize motion of the housing in any direction other than the tow direction. The housing includes at least one of an electric field and a magnetic field sensing element associated therewith.
    Type: Application
    Filed: September 13, 2006
    Publication date: October 4, 2007
    Inventors: Stig Rune Lennart Tenghamn, Rune Johan Magnus Mattsson, Peter Gunnar Krylstedt, Mattias Fredrik Karlsson, Ulf Peter Lindqvist, Per Anders Davidsson