Patents by Inventor Mark A. Stevens

Mark A. Stevens 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).

  • Patent number: 10370807
    Abstract: A barrier system includes a plurality of barriers that can be used to form a barrier wall. Each barrier includes a first panel at least partially bounding a cavity and a first leg assembly supporting the first panel in an elevated position. A plurality of spikes are removably disposed on the first panel. A flexible snare is disposed within the cavity of the first panel, the snare being secured to the plurality of spikes so that when the spikes are removed from the first panel, the snare is drawn away from the first panel by the spikes.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: August 6, 2019
    Assignee: Off The Wall Products, LLC
    Inventors: Eric M. Stevens, Leo F. Stanko, Mark A. Stevens, Nevin J. Zimmerly, Dennis Kovach
  • Publication number: 20180135262
    Abstract: A barrier system includes a plurality of barriers that can be used to form a barrier wall. Each barrier includes a first panel at least partially bounding a cavity and a first leg assembly supporting the first panel in an elevated position. A plurality of spikes are removably disposed on the first panel. A flexible snare is disposed within the cavity of the first panel, the snare being secured to the plurality of spikes so that when the spikes are removed from the first panel, the snare is drawn away from the first panel by the spikes.
    Type: Application
    Filed: November 16, 2017
    Publication date: May 17, 2018
    Inventors: Eric M. Stevens, Leo F. Stanko, Mark A. Stevens, Nevin J. Zimmerly, Dennis Kovach
  • Patent number: 8668613
    Abstract: A two-speed transmission having an input shaft and an output shaft, the transmission being capable of transitioning between fixed ratios, the high-range ratio being direct 1:1 and the low-range ratio being about 2:1. The transmission is a simple lightweight, yet robust, configuration utilizing only two gear meshes, being comprised of an input gear, a cluster gear, and an output gear. The transmission is controlled with a clutch and a sprag and with the input and output shafts turning in the same direction.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: March 11, 2014
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Mark A Stevens, Robert F Handschuh, David G Lewicki
  • Patent number: 8481976
    Abstract: A method of detecting changes in a scene comprising placing a fluorescent and/or phosphorescent compound in the scene and monitoring for elimination or change in position of the phosphorescent compound.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: July 9, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Mark A. Stevens, Leslie D. Kramer, Randy Pike
  • Patent number: 8253115
    Abstract: A method of detecting changes in a scene comprising placing a fluorescent and/or phosphorescent compound in the scene and monitoring for elimination or change in position of the phosphorescent compound. Also a liquid fluorescent and/or phosphorescent material comprising one or more compounds that are fluorescent and/or phosphorescent in infrared frequencies and substantially not fluorescent and/or phosphorescent in visible light frequencies and a carrier.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: August 28, 2012
    Assignee: Lockheed Martin Corporation
    Inventors: Mark A. Stevens, Leslie D. Kramer, Randy Pike
  • Patent number: 8091445
    Abstract: A two-speed transmission having an input shaft and an output shaft, the transmission being capable of transitioning between fixed ratios, the high-range ratio being direct 1:1 and the low-range ratio being about 2:1. The transmission is a simple lightweight, yet robust, configuration utilizing only two gear meshes, being comprised of an input gear, a cluster gear, and an output gear. The transmission is controlled with a clutch and a sprag and with the input and output shafts turning in the same direction.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: January 10, 2012
    Assignee: The United States of America as represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Mark A. Stevens, Robert F. Handschuh, David G. Lewicki
  • Patent number: 7645972
    Abstract: An apparatus rapidly reads out wavefront errors of an input wavefront and includes a holographic optical element (HOE), a position readout detector and a readout device. The HOE receives the input wavefront and includes a hologram of a particular wavefront recorded with reference waves, each defining a particular aberration coefficient. The position readout detector includes a plurality of position sensing devices (PSDs) receiving an optical output of the HOE, each PSD sensing the occurrence and magnitude in the input wavefront of any of the particular aberrations defined by the reference waves recorded to the holographic optical element with the particular wavefront. The readout device provides a readout value of each PSD upon application of the input wavefront to the holograph optical element, each readout value representing in the input wavefront the presence and magnitude of any of the particular aberrations defined by the reference waves.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: January 12, 2010
    Assignee: Lockheed Martin Corporation
    Inventors: Mark A. Stevens, Allen C. Layton
  • Publication number: 20080144018
    Abstract: An apparatus rapidly reads out wavefront errors of an input wavefront and includes a holographic optical element (HOE), a position readout detector and a readout device. The HOE receives the input wavefront and includes a hologram of a particular wavefront recorded with reference waves, each defining a particular aberration coefficient. The position readout detector includes a plurality of position sensing devices (PSDs) receiving an optical output of the HOE, each PSD sensing the occurrence and magnitude in the input wavefront of any of the particular aberrations defined by the reference waves recorded to the holographic optical element with the particular wavefront. The readout device provides a readout value of each PSD upon application of the input wavefront to the holograph optical element, each readout value representing in the input wavefront the presence and magnitude of any of the particular aberrations defined by the reference waves.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 19, 2008
    Inventors: Mark A. Stevens, Allen C. Layton
  • Patent number: 7326027
    Abstract: Centrifugal compressor flow stabilizing devices and methods of operation thereof are disclosed that act upon the flow field discharging from the impeller of a centrifugal compressor and modify the flow field ahead of the diffuser vanes such that flow conditions contributing to rotating stall and surge are reduced or even eliminated. In some embodiments, shaped rods and methods of operation thereof are disclosed, whereas in other embodiments reverse-tangent air injection devices and methods are disclosed.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: February 5, 2008
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Gary J. Skoch, Mark A. Stevens, Thomas A. Jett
  • Patent number: 6547078
    Abstract: An apparatus for the automated processing of bulk mail in a continuous and automatic procedure includes an operative combination of processing stations including an input station for receiving incoming mail in bulk fashion and for separating the pieces of mail for individual delivery to the remainder of the apparatus a station for detecting irregularities in the contents of the envelopes, such as metal items, folded contents, or oversized items; a station for outsorting envelopes rejected in accordance with determinations made at the detection station; a station for opening the envelopes, preferably along multiple edges; a station for removing the contents from the opened envelopes, for subsequent processing of the contents; and a series of stations for handling and orienting the contents for subsequent delivery to a plurality of output stackers.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: April 15, 2003
    Assignee: Opex Corporation
    Inventors: William R. Lile, Albert F. Stevens, Mark A. Stevens, Robert R. Dewitt, Michael E. York, Roy E. Patterson
  • Publication number: 20020143823
    Abstract: A translator, system, and method of translation is provided for translating a source file in a source format to a target file in a target format. A feature identifier determines a feature set of the source file, and a feature writer writes the feature set into the target file in the target format. Optionally, the feature identifier may include a front-end lookup table to map code fragments of the source file to a list of features. The feature writer may include a back-end lookup table to map the feature set to code fragments of the target file format.
    Type: Application
    Filed: January 19, 2001
    Publication date: October 3, 2002
    Inventor: Mark A. Stevens
  • Patent number: 6445808
    Abstract: Envelopes with unspecified contents are inspected by a “magnetic imaging” device which operates to identify magnetic indicia associated with the contents of the envelopes in order to identify the orientation of contents within the envelopes and/or to identify magnetic indicia indicative of the magnetic stripe of a credit/debit card or its remnants, in addition to a second detection device (e.g., a thickness measuring device or a metal detecting device) which can then verify whether the indicia indicative of a magnetic stripe signify the presence of a credit/debit card or some other stimulus such as a paper clip or the like. Similar assurances can be provided by employing a thickness measuring device and a metal detecting device, in operative combination (with or without the addition of a magnetic imaging device).
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: September 3, 2002
    Assignee: Opex Corporation
    Inventors: William R. Lile, Mark A. Stevens, George L. Hayduchok
  • Patent number: 6064023
    Abstract: An apparatus for the automated processing of bulk mail in a continuous and automatic procedure includes an operative combination of processing stations including an input station for receiving incoming mail in bulk fashion and for separating the pieces of mail for individual delivery to the remainder of the apparatus; a station for detecting irregularities in the contents of the envelopes, such as metal items, folded contents, or oversized items; a station for out-sorting envelopes rejected in accordance with determinations made at the detection station; a station for opening the envelopes, preferably along multiple edges; a station for removing the contents from the opened envelopes, for subsequent processing of the contents; and a series of stations for handling and orienting the contents for subsequent delivery to a plurality of output stackers.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: May 16, 2000
    Assignee: Opex Corporation
    Inventors: William R. Lile, Albert F. Stevens, Mark A. Stevens, Robert R. Dewitt, Michael E. York, Roy E. Patterson
  • Patent number: 5842577
    Abstract: An apparatus is provided for sorting a group of documents contained with an envelope into selected batches of documents. An envelope feeder feeds a group of envelopes containing documents onto a document transport. A document extractor positioned along the path of movement extracts the documents from the envelopes. A system controller identifies the documents extracted from each respective envelope as a single transaction along the path of movement. An orientation detector including a magnetic image reader and an optical image reader determines the orientation of selected documents along the path of movement. A document orientor changes the orientation of documents along the path of movement into a desired orientation. A document feeder is positioned downstream from the envelope feeder to selectively feed batch identification pieces into the path of movement.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: December 1, 1998
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Mark A. Stevens, Robert R. DeWitt, George L. Hayduchok, Edward Cohen
  • Patent number: 5842693
    Abstract: In a method for the automated processing of bulk mail, envelopes are transferred to a receiving apparatus in bulk fashion (from incoming mail trays or the like) for the extraction of documents contained by the envelopes, and the extracted documents are delivered to a remittance processing device, preferably both automatically and without the need for human intervention. Subsequent processing of the extracted documents within the remittance processing device then proceeds in usual fashion, completing the acquisition of information which is necessary to ready such documents for deposit into the banking system. Also disclosed are various presorting functions so that only envelopes containing documents of a specified type will be fully processed, other sorting functions such as the identification of specific types of documents (invoices or checks) for separate processing, and the use of a single extraction device to deliver extracted documents to either one, or a series of remittance processing devices.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: December 1, 1998
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Mark A. Stevens, Robert R. Dewitt, William R. Lile, Michael E. York, Jeffrey L. Chodack, Roy E. Patterson
  • Patent number: 5649628
    Abstract: To identify the orientation of specified documents, such as checks bearing magnetic ink markings, steps are taken to magnetize ink markings associated with the document, and to then detect magnetized ink markings on the document to develop electrical signals which can then be subjected to processing for identifying the orientation of the document based upon certain preestablished criteria. The result is a stand-alone device adapted to operate upon documents which are contained within envelopes to be subjected to an extraction procedure, prior to extraction from the envelopes, achieving a pre-processing of envelopes to identify those which contain the specified documents, and the orientation of the identified documents. The device is similarly adapted to operate upon the extracted documents, to identify those requiring special handling, and their orientation.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: July 22, 1997
    Assignee: Opex Corporation
    Inventors: Mark A. Stevens, William R. Lile
  • Patent number: 5540338
    Abstract: To identify the orientation of specified documents, such as checks bearing magnetic ink markings, steps are taken to magnetize ink markings associated with the document, and to then detect magnetized ink markings on the document to develop electrical signals which can then be subjected to processing for identifying the orientation of the document based upon certain preestablished criteria. The result is a stand-alone device adapted to operate upon documents which are contained within envelopes to be subjected to an extraction procedure, prior to extraction from the envelopes, achieving a pre-processing of envelopes to identify those which contain the specified documents, and the orientation of the identified documents. The device is similarly adapted to operate upon the extracted documents, to identify those requiring special handling, and their orientation.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: July 30, 1996
    Assignee: Opex Corporation
    Inventors: Mark A. Stevens, William R. Lile
  • Patent number: 5518121
    Abstract: In a method for the automated processing of bulk mail, envelopes are transferred to a receiving apparatus in bulk fashion (from incoming mail trays or the like) for the extraction of documents contained by the envelopes, and the extracted documents are delivered to a remittance processing device, preferably both automatically and without the need for human intervention. Subsequent processing of the extracted documents within the remittance processing device then proceeds in usual fashion, completing the acquisition of information which is necessary to ready such documents for deposit into the banking system. Also disclosed are various presorting functions so that only envelopes containing documents of a specified type will be fully processed, other sorting functions such as the identification of specific types of documents (invoices or checks) for separate processing, and the use of a single extraction device to deliver extracted documents to either one, or a series of remittance processing devices.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: May 21, 1996
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Mark A. Stevens, Robert R. DeWitt, William R. Lile, Michael E. York, Jeffrey L. Chodack, Roy E. Patterson
  • Patent number: 5397003
    Abstract: To identify the orientation of specified documents, such as checks bearing magnetic ink markings, steps are taken to magnetize ink markings associated with the document, and to then detect magnetized ink markings on the document to develop electrical signals which can then be subjected to processing for identifying the orientation of the document based upon certain preestablished criteria. The result is a stand-alone device adapted to operate upon documents which are contained within envelopes to be subjected to an extraction procedure, prior to extraction from the envelopes, achieving a pre-processing of envelopes to identify those which contain the specified documents, and the orientation of the identified documents. The device is similarly adapted to operate upon the extracted documents, to identify those requiring special handling, and their orientation.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: March 14, 1995
    Assignee: Opex Corporation
    Inventors: Mark A. Stevens, William R. Lile
  • Patent number: 5310062
    Abstract: An apparatus for the automated processing of bulk mail, wherein envelopes are transferred to the apparatus in bulk fashion (from incoming mail trays or the like) for the extraction of documents contained by the envelopes, communicates with a remittance processing device, preferably both automatically and without the need for human intervention. Subsequent processing of the extracted documents within the remittance processing device then proceeds in usual fashion, completing the acquisition of information which is necessary to ready such documents for deposit into the banking system.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: May 10, 1994
    Assignee: Opex Corporation
    Inventors: Albert F. Stevens, Mark A. Stevens, Robert R. DeWitt, William R. Lile, Michael E. York, Jeffrey L. Chodack, Roy E. Patterson