Patents by Inventor Stefan Andersson

Stefan Andersson 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).

  • Publication number: 20020056044
    Abstract: A communications device, which has a cryptographic module for use in mobile communications, can be used as a cryptographic services provider. For example, the device may be a device which can operate under the Wireless Application Protocol, that is, a WAP-enabled device, such as a mobile phone. This has the advantage that WAP-enabled devices include components which are used in public key/private key cryptographic systems as a part of their standard communication functions. These components therefore advantageously allow the device to be used as a cryptographic services provider. Advantageously, the device can use Wireless Transport Layer Security (WTLS) for mobile communications, and employs its cryptographic module when in use as a cryptographic services provider.
    Type: Application
    Filed: October 16, 2001
    Publication date: May 9, 2002
    Inventor: Stefan Andersson
  • Publication number: 20020034301
    Abstract: An existing communications device, such as a WAP-enabled mobile phone or other device, can be used as an authentication token.
    Type: Application
    Filed: August 14, 2001
    Publication date: March 21, 2002
    Inventor: Stefan Andersson
  • Publication number: 20020026584
    Abstract: A system and method for digitally signing a document including a personal computer which receives the document to be digitally signed. A representation of the document is created from the document and this representation is forwarded to a personal trusted device such as a mobile terminal, personal computer, etc. The user may then view the document on the personal computer and provide a digital signature of the document from the personal trusted device.
    Type: Application
    Filed: March 8, 2001
    Publication date: February 28, 2002
    Inventors: Janez Skubic, Paul Dent, Ben Smeets, Stefan Andersson, Mikael Nilsson, Helena Lindskog
  • Patent number: 5949303
    Abstract: A feed line structure (1), especially integrated with a stationary array of antenna elements so as to enable adjustment of the direction of the beam radiated from the array. The feed line structure comprises a feed conductor line pattern (3) disposed on a fixed carrier plate (2) at a distance from and in parallel to a fixed ground plate (4), and a movable dielectric plate (5) located therebetween. The feed line pattern (3) is elongated in the same direction (A) as the movement direction of the dielectric plate (5). The propagation velocity of the signal components is reduced by the dielectric plate (5), whereby a controlled phase difference between the various signal components is obtained.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: September 7, 1999
    Assignee: Allgon AB
    Inventors: Per-Anders Arvidsson, Stefan Andersson
  • Patent number: 5716302
    Abstract: A dummy which is constructed to register blows inflicted thereon, wherein the dummy includes one or more sensors at the location or those locations on the dummy where a blow or blows delivered thereto shall be registered, and wherein the sensor or sensors is/are adapted to deliver an electric signal to a computer. The sensor (3, 13, 14) includes a pressure sensor (5) which is adapted to deliver an electric signal which corresponds to the pressure generated in the pressure sensor in response to a blow landing on said sensor; and in that the surface of the sensor (3, 13, 14) parallel with the dummy surface on which the sensor is attached is divided into two or more sections (4), where each section (4) is adapted to deliver an electric signal when the blow lands on the section concerned.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: February 10, 1998
    Assignee: Lars Andersson
    Inventor: Stefan Andersson
  • Patent number: 5679521
    Abstract: Disclosed are methods and compositions for the preparation of steroid 5.alpha.-reductases by recombinant means, as well as for the use of these enzymes in screening assays for the identification of compounds which have the ability to inhibit or otherwise alter the enzymatic function of these enzymes. Biochemical and pharmacological evidence is presented to demonstrate the existence of more than one human steroid 5.alpha.-reductase. The DNA sequence encoding steroid 5.alpha.-reductase 2, the major active isozyme of human genital tissue, is disclosed herein, in addition to methods and compositions for its preparation and pharmacological analysis. The sequences disclosed herein may be used directly in the preparation of genetic constructs, or may be employed in the preparation of hybridization probes for the selection of enzyme-encoding sequences from other sources.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: October 21, 1997
    Assignee: Board of Regents, The University of Texas System
    Inventors: Stefan Andersson, David W. Russell
  • Patent number: 5115137
    Abstract: A sample (1) is irradiated by a pulse from a laser (2), creating fluorescence radiation, which is brought, in imaging relation or otherwise, to a detector (6) sensing from the same sample (1) in a plurality of spectral intervals (6A-6D), for obtaining intensity values. The radiation may be sensed in imaging relation, creating a multiplicity of said pluralities. The spectral intervals may be wavelength defined by passband filters (5A-5D) or time interval defined time spectral intervals controlled by a computer (7), which makes a numerical evaluation comprising a division. The tissue character may then be evaluated from the evaluation.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: May 19, 1992
    Assignee: Spectraphos AB
    Inventors: Stefan Andersson-Engels, Jonas Johansson, Unne Stenram, Katarina Svanberg, Sune Svanberg