Patents by Inventor Andrew Schaefer

Andrew Schaefer 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: 20190277670
    Abstract: An electrical measurement device for measuring at least one electrical signal is described, the electrical measurement device comprising an electrical measurement unit for measuring the electrical signal and for deriving at least one measurement parameter from the measured electrical signal, an acoustic processing unit for processing a signal obtained from the electrical measurement unit, and a loudspeaker for outputting an acoustic signal representative of the signal obtained from the electrical measurement unit. The acoustic processing unit is configured to generate the acoustic signal to be outputted by the loudspeaker. The acoustic processing unit is further configured to modulate a predetermined acoustic signal by the at least one measurement parameter.
    Type: Application
    Filed: March 8, 2018
    Publication date: September 12, 2019
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andrew Schaefer, Markus Freidhof
  • Publication number: 20190190566
    Abstract: The present invention provides to an estimation of a directed signal on a bidirectional duplex transmission line without the need of a directional coupler which has to be physically inserted into the wired transmission line. It is for this purpose, that the signals on the transmission line are measured at two separate spatial positions and the directed signals on the wired transmission line are estimated by analyzing the measured signals.
    Type: Application
    Filed: February 2, 2018
    Publication date: June 20, 2019
    Inventor: Andrew SCHAEFER
  • Patent number: 10281494
    Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: May 7, 2019
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andrew Schaefer, Thomas Kuhwald, Bernhard Nitsch
  • Publication number: 20180120354
    Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 3, 2018
    Inventors: Andrew Schaefer, Thomas Kuhwald, Bernhard Nitsch
  • Patent number: 9958479
    Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: May 1, 2018
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andrew Schaefer, Thomas Kuhwald, Bernhard Nitsch
  • Patent number: 9835978
    Abstract: An end seal for an electrophotographic image forming device according to one example embodiment includes an elastomeric body having a blade seal portion for sealing against a rear surface of a doctor blade and a curved rotary seal portion that extends from a bottom end of the blade seal portion for sealing against an outer surface of a rotatable developer roll. The end seal includes a cutout in an inner axial side of the body positioned at a point where the rotary seal portion and the blade seal portion meet.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: December 5, 2017
    Assignee: Lexmark International, Inc.
    Inventors: Scott Richard Castle, Richard Louis Goin, Brad Edward Mattingly, Benjamin Erich Kant, Joseph Andrew Schaefer
  • Patent number: 9759747
    Abstract: A method and a device for determining a trigger condition for presenting a registered signal on a display of an oscilloscope on the basis of a rare signal event in the registered signal. The method and device determines a level-based and/or time-based distribution of frequencies of occurrence from level-based and/or time-based parameters determined from sampled values of the registered signal in a specified corresponding level-raster and/or time raster, and compares the determined level-based and/or time-based distribution of frequencies of occurrence with a previously given corresponding level-based and/or time-based reference-distribution of frequencies of occurrence. A first trigger condition is determined dependent upon an identified difference between corresponding level-based and/or time-based distribution of frequencies of occurrence and corresponding level-based and/or time-based reference-distribution of frequencies of occurrence.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: September 12, 2017
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Andrew Schaefer, Kai Uwe Schmidt
  • Publication number: 20170082949
    Abstract: An end seal for an electrophotographic image forming device according to one example embodiment includes an elastomeric body having a blade seal portion for sealing against a rear surface of a doctor blade and a curved rotary seal portion that extends from a bottom end of the blade seal portion for sealing against an outer surface of a rotatable developer roll. The end seal includes a cutout in an inner axial side of the body positioned at a point where the rotary seal portion and the blade seal portion meet.
    Type: Application
    Filed: August 18, 2016
    Publication date: March 23, 2017
    Inventors: SCOTT RICHARD CASTLE, RICHARD LOUIS GOIN, BRAD EDWARD MATTINGLY, BENJAMIN ERICH KANT, JOSEPH ANDREW SCHAEFER
  • Publication number: 20150301086
    Abstract: A method and a device for determining a trigger condition for presenting a registered signal on a display of an oscilloscope on the basis of a rare signal event in the registered signal. The method and device determines a level-based and/or time-based distribution of frequencies of occurrence from level-based and/or time-based parameters determined from sampled values of the registered signal in a specified corresponding level-raster and/or time raster, and compares the determined level-based and/or time-based distribution of frequencies of occurrence with a previously given corresponding level-based and/or time-based reference-distribution of frequencies of occurrence. A first trigger condition is determined dependent upon an identified difference between corresponding level-based and/or time-based distribution of frequencies of occurrence and corresponding level-based and/or time-based reference-distribution of frequencies of occurrence.
    Type: Application
    Filed: November 5, 2013
    Publication date: October 22, 2015
    Inventors: Andrew Schaefer, Kai Uwe Schmidt
  • Publication number: 20150247883
    Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.
    Type: Application
    Filed: February 27, 2015
    Publication date: September 3, 2015
    Inventors: Andrew Schaefer, Thomas Kuhwald, Bernhard Nitsch
  • Patent number: 8797815
    Abstract: A measuring device for the efficient storage of test values and associated addresses provides a first storage region (30) and a second storage region (33). The first storage region (30) comprises a first number of memory cells (32) of a first cell size (31). The second storage region (33) comprises a second number of memory cells (35) of a second cell size (34). The measuring device further provides a third storage region (36) made from a second number of memory cells (38). A memory cell (38) of the third storage region (36) is rigidly assigned to each memory cell (35) of the second storage region (33).
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: August 5, 2014
    Assignee: Rohde & Schwarz GmbH & Co. Kg
    Inventor: Andrew Schaefer
  • Publication number: 20120287738
    Abstract: A measuring device for the storage of test values and associated addresses provides a first storage region (30) and a second storage region (33). The first storage region (30) comprises a first number of memory cells (32) of a first cell size (31). The second storage region (33) comprises a second number of memory cells (35) of a second cell size (34). The measuring device further provides a third storage region (36) made from a second number of memory cells (38). A memory cell (38) of the third storage region (36) is rigidly assigned to each memory cell (35) of the second storage region (33).
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Applicant: Rohde & Schwarz GmbH & Co. KG
    Inventor: Andrew Schaefer
  • Patent number: 7565540
    Abstract: The present invention relates to a system and method for fully electronic identity authentication, with particular application to electronic election registration and voting. In particular, the present invention provides an authentication system that operates in conjunction with a secure server to authenticate users to provide access information as needed for the authenticated users to access the secure server.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: July 21, 2009
    Assignee: Accenture Global Services GmbH
    Inventors: John J. Bogasky, Carl Almond, Andrew Schaefer
  • Patent number: 7418401
    Abstract: The present invention is directed to a secure electronic registration and voting solution incorporating integrated end-to-end voting system architecture and processes providing secure identification and authentication, voter registration, ballot definition, ballot presentation to the voter, voting, and ballot tabulation via secure transmission over the network. The disclosed embodiments of the present invention describe an integrated solution to voting via a network, such as the Internet. A user logs into the system using through an application on a local computer that presents an electronic ballot to a user and accepts the user's voting selections. The voting selections are then associated with the user's login data and an identifier for the local computer. The local application than encrypts the voting data and forwards a server that authenticates the encrypted voting data using the user login and the computer identifier. The still-encrypted voting data is then stored.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: August 26, 2008
    Assignee: Accenture Global Services GmbH
    Inventors: John J. Bogasky, Carl Almond, Andrew Schaefer
  • Patent number: 7399064
    Abstract: An ink jetting assembly includes a body, and an ink jet chip attached to the body. The ink jet chip has a mounting surface, a face surface, an ink channel extending to the face surface, and at least one actuator associated with the ink channel. The actuator includes a plurality of electrical contact pads formed on the face surface. A plurality of passageways extends through the ink jet chip from the mounting surface to the face surface. The ink jetting assembly also includes a plurality of electrodes. Each of the plurality of electrodes passes through a respective passageway of the plurality of passageways and is electrically connected to a respective contact pad of the plurality of electrical contact pads at the face surface.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 15, 2008
    Assignee: Lexmark International, Inc.
    Inventors: John Richard Fowler, Ganesh Vinayak Phatak, Matthew Joe Russell, Jeffrey Louis Sangalli, Joseph Andrew Schaefer, David Amos Ward