Patents by Inventor Stefan Lindgren
Stefan Lindgren 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).
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Patent number: 11252320Abstract: A method for determining whether a video camera is out-of-focus comprises: capturing image data; setting a focus setting difference threshold based on a filter function configured to filter the image data; adjusting a focus setting between a present focus setting and an altered focus setting such that a first subset of the image data is captured with the video camera being set in the present focus setting and such that a second subset of the image data is captured with the video camera being set in the altered focus setting, wherein the adjusting is performed such that a difference between the present and altered focus settings is below the threshold; forming the video stream by applying the filter function on the image data; determining first and second focus metrics of the image data; and determining whether the video camera is out-of-focus by comparing the first and second focus metrics.Type: GrantFiled: March 8, 2021Date of Patent: February 15, 2022Inventors: Johan Jeppsson, Björn Benderius, Niclas Svensson, Fritjof Jonsson, Jonas Levin, Stefan Lindgren
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Publication number: 20210281738Abstract: A method for determining whether a video camera is out-of-focus comprises: capturing image data; setting a focus setting difference threshold based on a filter function configured to filter the image data; adjusting a focus setting between a present focus setting and an altered focus setting such that a first subset of the image data is captured with the video camera being set in the present focus setting and such that a second subset of the image data is captured with the video camera being set in the altered focus setting, wherein the adjusting is performed such that a difference between the present and altered focus settings is below the threshold; forming the video stream by applying the filter function on the image data; determining first and second focus metrics of the image data; and determining whether the video camera is out-of-focus by comparing the first and second focus metrics.Type: ApplicationFiled: March 8, 2021Publication date: September 9, 2021Applicant: Axis ABInventors: Johan JEPPSSON, Björn BENDERIUS, Niclas SVENSSON, Fritjof JONSSON, Jonas LEVIN, Stefan LINDGREN
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Patent number: 9420966Abstract: A measuring system for measuring the concentration of substances or analytes in a body fluid or in a body tissue comprises a microdialysis probe comprising a microdialysis membrane, the probe being adapted to be placed in blood or in tissue, a flow through sensor for analyzing a fluid having passed the microdialysis probe, a pump for pumping the fluid to and through the microdialysis probe and further to and through the sensor, and tubing connecting the pump to the microdialysis probe and the microdialysis probe to the sensor. The pump effects a flow rate in the system in the interval 0.2-15 microliters per minute. The sensor comprises a flow channel having a flow resistance or pressure drop adapted to the characteristics of the microdialysis membrane so as to eliminate, or at least substantially reduce, ultra filtering in the microdialysis membrane.Type: GrantFiled: February 2, 2015Date of Patent: August 23, 2016Assignee: MAQUET CRITICAL CARE ABInventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
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Patent number: 9101304Abstract: A measuring system (100) for continuously measuring body fluid constituents, said measuring system (100) comprising a microdialysis catheter or probe (110) comprising a microdialysis membrane (116) to be placed in a blood stream or in tissue fluid. The measuring system further comprises a flow through sensor (200) for continuously measuring the concentration of substances present in the fluid that has passed the microdialysis membrane (116). The measuring system (100) further comprises a waste container (126).Type: GrantFiled: July 2, 2009Date of Patent: August 11, 2015Assignee: Maquet Critical Care ABInventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
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Publication number: 20150148639Abstract: A measuring system for measuring the concentration of substances or analytes in a body fluid or in a body tissue comprises a microdialysis probe comprising a microdialysis membrane, the probe being adapted to be placed in blood or in tissue, a flow through sensor for analysing a fluid having passed the microdialysis probe, a pump for pumping the fluid to and through the microdialysis probe and further to and through the sensor, and tubing connecting the pump to the microdialysis probe and the microdialysis probe to the sensor. The pump effects a flow rate in the system in the interval 0.2-15 microliters per minute. The sensor comprises a flow channel having a flow resistance or pressure drop adapted to the characteristics of the microdialysis membrane so as to eliminate, or at least substantially reduce, ultra filtering in the microdialysis membrane.Type: ApplicationFiled: February 2, 2015Publication date: May 28, 2015Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
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Patent number: 8483121Abstract: The present invention relates to a method for energy saving in a telecommunication system with at least one first base station 24 for enabling communication within a first cell. A signal having a frame structure is transmitted in the first cell by the first base station 24. The structure of at least some frames comprises an overhead part with at least synchronization or system information. The first base station 24 is in a normal mode operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a first area 27. The method is particularly characterized in that the first base station 24 in a power saving mode is operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a second area 23 being larger than the first area 27.Type: GrantFiled: September 5, 2007Date of Patent: July 9, 2013Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Stefan Lindgren, Sten Sjöberg
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Patent number: 8331276Abstract: A signal having a frame structure is transmitted and received in a cell by a first base station, the structure of the frame having a downlink frame part and an uplink frame part. Each frame part has the ability of carrying at least one data region allocated to at least one user or broadcasted for the traffic flow between the telecommunication network and the user terminal via the first base station. The downlink frame part has an overhead part with at least synchronization or system information. The frame structured signal is transmitted periodically Frame N, Frame N+1, Frame N+2, Frame N+3 with a normal interval defined by the system. The system during, a power saving mode, increases the interval between at least a first and the next following second frame structured signal to a power saving interval.Type: GrantFiled: September 5, 2007Date of Patent: December 11, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Stefan Lindgren, Sten Sjöberg Sjöberg
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Patent number: 8195945Abstract: A method for storing and updating digital certificates in a flash memory, a flash memory, and an electronic apparatus exploiting the method are disclosed. The method is applicable for a flash memory having predefined erase-write blocks and write-read blocks, for enhancing the tampering proof characteristics of the flash memory. The certificates may be used to authenticate a computer program and may be verified by a verification program associated with the computer program. The method may include defining a plurality of memory slots within at least one erased erase-write block wherein each memory slot have a commencing address comprising a binary “0”- or a binary “1” bit pattern, writing a first and second digital certificate in a first and second one of the memory slots, defining a certificate slot address pointer, and updating the certificate slot address pointer by replacing said “0”- or “1”-bit pattern of the pointer with a “1”- or a “0” bit pattern, respectively.Type: GrantFiled: December 1, 2005Date of Patent: June 5, 2012Assignee: Sony Mobile Communications ABInventors: Stefan Andersson, Werner Johansson, Stefan Lindgren
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Publication number: 20110213230Abstract: A measuring system (100) for continuously measuring body fluid constituents, said measuring system (100) comprising a microdialysis catheter or probe (110) comprising a microdialysis membrane (116) to be placed in a blood stream or in tissue fluid. The measuring system further comprises a flow through sensor (200) for continuously measuring the concentration of substances present in the fluid that has passed the microdialysis membrane (116). The measuring system (100) further comprises a waste container (126).Type: ApplicationFiled: July 2, 2009Publication date: September 1, 2011Inventors: Stefan Lindgren, Anders Carlsson, Anton Karlsson, Henrik Falkén, Gerhard Jobst
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Publication number: 20100331727Abstract: There is provided a linear device (100) for microdialysis, comprising a length of tubing (102) having at least one lumen (118) wherein at least one tubular membrane sleeve (104) is coaxially arranged outside the tubing periphery and extending at least partially along the periphery of the tubing (102). The membrane sleeve (104) is extending intermediate the ends of the tubing (102), and the tubing (102) extends at least through the tubular membrane sleeve (104). There is also provided a method of manufacturing the linear device (100) and a method wherein the linear device (100) is used.Type: ApplicationFiled: July 9, 2008Publication date: December 30, 2010Inventors: Stefan Lindgren, Anton Karlsson
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Publication number: 20100267333Abstract: The present invention is directed to a method and a node arrangement for extending the cell range in a wireless communication system, which communication system comprises a communication network arranged to operatively communicate with at least one mobile terminal via an air interface having a cell range extending to a cell edge, and at least one mobile terminal arranged to operatively communicate with said communication network via said air interface. The method comprises the steps of: obtaining information about the condition of an up-link signal from said at least one mobile terminal; determining whether said terminal is located at or near the cell edge, and extending the cell range by increasing the time for up-link transmission if the terminal is located at or near the cell edge.Type: ApplicationFiled: December 20, 2007Publication date: October 21, 2010Inventors: Anders Lamm, Stefan Lindgren, Sten Sjöberg, Shiau-He Tsai
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Publication number: 20100246462Abstract: The present invention relates to a method for energy saving in a telecommunication system with at least one first base station 24 for enabling communication within a first cell. A signal having a frame structure is transmitted in the first cell by the first base station 24. The structure of at least some frames comprises an overhead part with at least synchronization or system information. The first base station 24 is in a normal mode operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a first area 27. The method is particularly characterized in that the first base station 24 in a power saving mode is operated to transmit at least the overhead part so that it substantially reaches all user terminals within the first cell covering a second area 23 being larger than the first area 27.Type: ApplicationFiled: September 5, 2007Publication date: September 30, 2010Applicant: TELEFONAKTIEBOLAGET L M ERICSSONInventors: Stefan Lindgren, Sten Sjöberg
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Publication number: 20100214969Abstract: A base station for use in a WiMAX system comprise means for sending a wake-up signal to an idle terminal to indicate to the terminal that a paging signal is about to be sent to the terminal. The terminal receives and interprets the wake-up signal and prepares itself for receiving the paging signal. This saves battery power in the terminal since the wake-up signal can be detected more easily than the paging signal. The base station, in the mean time, can reduce its paging message traffic and saves overhead in downlink transmission.Type: ApplicationFiled: May 3, 2007Publication date: August 26, 2010Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Anders Lamm, Stefan Lindgren, Shiau-He Shawn Tsai
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Publication number: 20100189023Abstract: A signal having a frame structure is transmitted and received in a cell by a first base station, the structure of the frame having a downlink frame part and an uplink frame part. Each frame part has the ability of carrying at least one data region allocated to at least one user or broadcasted for the traffic flow between the telecommunication network and the user terminal via the first base station. The downlink frame part has an overhead part with at least synchronization or system information. The frame structured signal is transmitted periodically Frame N, Frame N+1, Frame N+2, Frame N+3 with a normal interval defined by the system. The system during, a power saving mode, increases the interval between at least a first and the next following second frame structured signal to a power saving interval.Type: ApplicationFiled: September 5, 2007Publication date: July 29, 2010Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventors: Stefan Lindgren, Sten Sjöberg
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Publication number: 20070130439Abstract: The invention relates generally to data security and to data memory technologies, and more specifically provides a method for storing and updating digital certificates in a flash memory, and provides further a flash memory and an electronic apparatus exploiting said method.Type: ApplicationFiled: December 1, 2005Publication date: June 7, 2007Applicant: SONY ERICSSON MOBILE COMMUNICATIONS ABInventors: Stefan Andersson, Werner Johansson, Stefan Lindgren
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Patent number: 6916969Abstract: The invention relates to a material laminate for use as a covering sheet on absorbent articles such as sanitary napkins, incontinence protectors, diapers, pant diapers, or the like. The material laminate comprises a first, fluid pervious fibrous material layer and a second fluid pervious porous material layer, wherein at least one of the two material layers comprises thermoplastic material and wherein the two material layers are mutually connected by means of the covering material laminate exhibiting bond sites within which the thermoplastic material has been caused to at least partially soften or melt and thereby bond the two material layers together.Type: GrantFiled: July 3, 2000Date of Patent: July 12, 2005Assignee: SCA Hygiene Products ABInventors: Bror-Inge Helmfridsson, Urban Nilsson, Stefan Lindgren
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Patent number: 6806831Abstract: A stacked patch antenna comprising two metallic patches (210, 240) stacked on top of each other. The middle patch (210) comprises at least two conductors (224, 234) at or close to its edge (212), which conductors are intended to be connected to a ground plane (200) to thereby ground the patch in two places. The top patch (240) comprises at least two conductors (254, 264) at or close to its edge (242) which electrically interconnect the two patches. The middle patch is fed at a feed area (219) which is at least proximate its geometric center. The middle patch further comprises at least two apertures (220, 230) completely within its circumference (212), i.e. each aperture having a respective unbroken circumference (232, 242). Thereby enabling radiation from slots (214, 216, 244, 246) defined by the edge of the top patch and the edge of the middle patch and defined by the edge of the middle patch and the ground plane.Type: GrantFiled: March 1, 2002Date of Patent: October 19, 2004Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Martin Johansson, Stefan Lindgren, Anna Grincwajg
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Publication number: 20020175871Abstract: A stacked patch antenna comprising two metallic patches (210, 240) stacked on top of each other. The middle patch (210) comprises at least two conductors (224, 234) at or close to its edge (212), which conductors are intended to be connected to a ground plane (200) to thereby ground the patch in two places. The top patch (240) comprises at least two conductors (254, 264) at or close to its edge (242) which electrically interconnect the two patches. The middle patch is fed at a feed area (219) which is at least proximate its geometric center. The middle patch further comprises at least two apertures (220, 230) completely within its circumference (212), i.e. each aperture having a respective unbroken circumference (232, 242). Thereby enabling radiation from slots (214, 216, 244, 246) defined by the edge of the top patch and the edge of the middle patch and defined by the edge of the middle patch and the ground plane.Type: ApplicationFiled: March 1, 2002Publication date: November 28, 2002Inventors: Martin Johansson, Stefan Lindgren, Anna Grincwajg
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Patent number: 5774609Abstract: Optical components intended for telecommunications purposes must be manufactured and mounted with a great degree of accuracy, since a component, such as an optochip, when mounted must be coupled optically, electrically, mechanically and thermally at the same time. In order to obtain a right-angled geometry when using surface-emitting or surface-detecting components, and to obtain a reduced optical travel path and accurate fixation of an optofiber, a reflective surface (12) which slopes at an angle of 45 degrees is arranged between a light-conducting core (16) and the active surface (10) of an optochip, and the light-conducting core has been placed closer to the reflective surface by bevelling the optofiber (9) and fitting the fiber in a V-groove and accurately fixating the fiber in the groove by means of a flat cover means (20).Type: GrantFiled: January 27, 1997Date of Patent: June 30, 1998Assignee: Telefonaktiebolaget LM EricssonInventors: Lennart Backlin, Ylva Backlund, H.ang.kan Elderstig, Stefan Lindgren, Odd Steijer