Patents by Inventor David E. Johnston

David E. Johnston 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: 7640069
    Abstract: Systems and methods for audio editing are provided. In one implementation, a computer-implemented method is provided. The method includes displaying audio data in a visual form. A user input is received demarcating an arbitrary region within the visual display of the audio data. A portion of the audio data is isolated corresponding to the region demarcated by the user. The isolated portion of the audio data is edited and the edited audio data is mixed into the audio data to create edited audio data.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: December 29, 2009
    Assignee: Adobe Systems Incorporated
    Inventor: David E. Johnston
  • Patent number: 7610110
    Abstract: Systems, methods, and apparatus, including computer program products, are provided for displaying visual representations of features of audio data. In general, in one aspect, a computer-implemented method and computer program product is provided. Audio data are received. The audio data are separated into a plurality of samples. Stereo phase data is calculated for each sample of the plurality of samples. The calculated stereo phase data is displayed.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: October 27, 2009
    Assignee: Adobe Systems Incorporated
    Inventor: David E. Johnston
  • Patent number: 7548791
    Abstract: Systems, methods, and computer program products for displaying visual representations of features of audio data are provided. In one implementation, a computer-implemented method is provided. Audio data is received. A visual representation of the audio data showing pan position is displayed. Displaying the visual representation includes calculating pan position data comprising one or more pan positions associated with audio data per unit time and plotting the calculated pan position data.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: June 16, 2009
    Assignee: Adobe Systems Incorporated
    Inventor: David E. Johnston
  • Publication number: 20090070674
    Abstract: This specification describes technologies relating to editing digital audio data. In some implementations, a computer-implemented method is provided. The method includes displaying a visual representation of audio data, receiving an input selecting a selected portion of audio data within the visual representation, the selecting including applying a brush tool to the visual representation of the audio data, and editing the selected portion of audio data including determining a degree of opacity for the selected audio data and applying an editing effect according to the degree of opacity.
    Type: Application
    Filed: January 30, 2008
    Publication date: March 12, 2009
    Applicant: ADOBE SYSTEMS INCORPORATED
    Inventor: David E. Johnston
  • Patent number: 6729624
    Abstract: A radial shaft seal for dynamic applications is disclosed. The shaft seal has a case member and a resilient sealing body attached to the case member. The sealing body includes an annular elastomeric member and a resinous ring. The elastomeric member has a radially extending section and a distal end. The resinous ring has a radially extending portion and an edge. The radially extending section is contiguous to the radially extending portion to form a composite seal lip body. The composite seal lip body, as installed, is positioned so that the distal end of the radially extending section and the edge of said radially extending portion engage the shaft in fluid tight relation by the elastomeric member and by the reaction forces of the resinous ring. Therefore, a portion of the reaction forces is shared by the edge and the distal end so as to reduce the wear in the distal end.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: May 4, 2004
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David E. Johnston
  • Publication number: 20020138435
    Abstract: A method and system for controlling distribution of content through a communications network uses a second, parallel network for delivery of a transaction indicia to a requesting party. The use of the parallel network enables the transaction indicia to be forwarded to the party independently of the communications network, thereby reducing the probability of a party fraudulently obtaining delivery of the content. Additionally, information associated with the parallel network can be used to restrict distribution of the content to parties within a predetermined domain, such as, for example, a geographical region. The content may be delivered to the party in an encrypted form, preferably using an encryption algorithm and key designed to enable decryption of the content on only the content delivery device from which the request for the content was originated.
    Type: Application
    Filed: March 26, 2001
    Publication date: September 26, 2002
    Inventors: L. Lloyd Williams, Alexander Markman, David E. Johnston, William B. Crago
  • Publication number: 20020122544
    Abstract: A system and method provide a call service features in response to call control information conveyed by a monitored bearer channel in a telecommunications network. A bearer channel monitor captures the call control information and relays the information to a call control application server. The call control application server analyzes the call control information, and provides call control instructions to a call control node that operates in the telecommunications network to effect the call service. The call control node serves as one or more virtual switching points in the network to directly control call routing without disconnecting a called or calling party, unless required as part of a service feature. Control from a center of the telecommunications network provides rapid and efficient call control without use of edge devices or duplication of bearer channels in the network.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 5, 2002
    Inventors: L. Lloyd Williams, Alexander Markman, David E. Johnston
  • Patent number: 6428013
    Abstract: An improved dual lip radial shaft seal is disclosed. The free end of the dual lip seal extends toward the air side of the seal. Optionally, the dual lip seal has an oil side excluder lip seal, an air side dust excluder lip seal, an elastomeric static seal extending from the elastomeric portion of the dual lip seal. In another optional embodiment, a relief groove is formed in the seal. A unitized seal version is also disclosed with two embodiments.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: August 6, 2002
    Assignee: Freudenberg-Nok General Partnership
    Inventors: David E. Johnston, Milton Griswold, David Sakata
  • Patent number: 6409177
    Abstract: A radial shaft seal with a membrane is disclosed. The surface of the membrane is in sealing contact with the shaft. A plurality of inclined waves are formed in the surface in response to shear stresses formed by movement of one of the support rings relative to the other. The inclined waves are generally elliptical in shape and form an undulating surface. The direction of the inclined waves can be changed in response to shaft rotation.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: June 25, 2002
    Assignee: Freudenberg-Nok General Partnership
    Inventor: David E. Johnston
  • Patent number: 6073933
    Abstract: A washer and dirt excluder for use with a seal. The washer and dirt excluder includes a flexible ring where that ring is in contact with an outer flange. The washer and dirt excluder further includes a stopper member located at a center point of the flexible ring. The washer and dirt excluder also includes a protrusion extending from a side of the washer opposite the stopper.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: June 13, 2000
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David E. Johnston
  • Patent number: 5921555
    Abstract: A uni-directional seal member for use on a shaft includes a rigid shell, a support member in contact with the rigid shell, and a resilient sealing member in contact with the support member and an insert washer. The sealing member has a sealing face, where that sealing face has a contact area having a radially extending profile of a cyclically repeating shape.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: July 13, 1999
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David E. Johnston
  • Patent number: 5791658
    Abstract: A shaft seal of the type utilizing a metal support element or seal case which fits or is inserted into a housing. The seal includes a seal element extending radially inward which when disposed over the shaft causes the seal to flex about a flex section thus applying a contacting force to a seal lip. The seal lip includes a plurality of radial undulations along the seal face, said undulations radial with respect to the axis of the shaft. Said seal lip further including a static seal for engaging the outer circumferential surface of the shaft. The seal element is formed of a semi-rigid material such as a fluorinated resin or thermo-plastic elastomer. Such seals exhibit high-wear characteristics opposed to the low-wear characteristics of an elastomer. Further, the seal element includes a plurality of symmetrical undulations which provide a hydro-dynamic pumping effect to pump any fluid migrating along the shaft/seal interface back into the sealed space.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: August 11, 1998
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David E. Johnston
  • Patent number: 5427387
    Abstract: A radial shaft sealing ring having a sealing axis and a sealing lip of polymer material is disclosed. The ring contacts the circumference of a shaft against which a seal is formed via a sealing lip halving ribs that are evenly distributed in the circumferential direction and which project radially inward. The sealing lip is delimited on the inside by a hollow-conical inner surface, which is widened in diameter in the direction of the side facing away from the sealed space. On the side of the sealing lip facing away from the space to be sealed, the inner surface forms a first angle with the sealing axis, which is 0.02 to 0.5 times as great as a second angle formed by this inner surface on the side of the sealing lip facing the sealed space and by the sealing axis. The ribs are formed as a corrugation of the inner surface which continues only in the circumferential direction along a circular circumferential line.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: June 27, 1995
    Assignee: Firma Carl Freudenberg
    Inventor: David E. Johnston
  • Patent number: 5380660
    Abstract: A method of reducing the loss of differentiative functions of cells cultured in culture medium containing serum which includes an inhibitor of cellular differentiation. The method includes treating the serum or serum-containing medium to remove or inactivate the inhibitor.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: January 10, 1995
    Assignee: New England Medical Center Hospitals, Inc.
    Inventors: Douglas M. Jefferson, David E. Johnston
  • Patent number: 5348312
    Abstract: A cassette seal for sealing off the gap between a bore hole and a shaft. The seal includes an inner ring which is secured to the shaft and has a groove open radially to the outside. The seal also includes an outer ring secured in the bore hole with a radial projection of a flange-type design that engages with the groove. The groove is defined in the axial direction by end faces turned toward each other. A sealing lip secured in the area of the inner circumference to the radial projection is formed from a polymer material. At least the inner ring is formed from a plastically deformed sheet metal. The sealing lip sealingly contacts the inner ring in the area of one end face. The inner ring is designed in one piece and is provided in the area of both axial ends with ring projections, which are produced by a plastic deformation and project radially to the outside. The outer ring is limited bounded in the axial direction on both sides by range spacers formed from a polymer material.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: September 20, 1994
    Assignee: Firma Carl Freudenberg
    Inventor: David E. Johnston
  • Patent number: 5190299
    Abstract: A radially undulating shaft seal having a seal axis and a lip of polymeric material that surrounds the shaft to be sealed. The lip is demarcated on the inside by an inner surface that tapers out in the form of a hollow cone toward the side facing away from the space being sealed; the lip also has ribs that project radially inward distributed uniformly around it. The ribs (3) consist of undulations propagated along the inner surface (2.1) parallel with the circumference. The difference between the adjacent maximal and minimal intervals (4 & 5) along the circumference between the inner surface and the axis (6) is less than 0.3 mm.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: March 2, 1993
    Assignee: Firma Carl Freudenberg
    Inventor: David E. Johnston
  • Patent number: 5123661
    Abstract: A casing component, such as a crankcase end cover of an automobile engine, has a fluid seal, such as an oil seal, incorporated with the component by being molded on to a flange which is an integral part of the component.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: June 23, 1992
    Inventors: David E. Johnston, Rui de Jesus Lopes
  • Patent number: 4855583
    Abstract: An identification card contains retrievable identification data in at least two formats. One format comprises a magnetic material that stores magnetically encoded data. Another format comprises electronic circuitry that stores electronically encoded data. The magnetically encoded data on the card may be retrieved by inserting the identification card into a reader having magnetic sensors. The electronically encoded data on the card may be transmitted from the card as a radio frequency signal that incorporates the data, to a remote sensor that receives and processes the radio frequency, data encoded signal. A structure for the identification card comprising these two data storage formats as well as a method of producing such an identification card is described.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: August 8, 1989
    Assignee: Figgie International, Inc.
    Inventors: Steven A. Fraser, David E. Johnston, Reece D. Metzger
  • Patent number: 4815749
    Abstract: A shaft seal having a lip of an elastomeric sealing ring formed with a frusto-conical band around the shaft and has an annular non-constant clearance around the shaft and wherein upon shaft rotation liquid pulsation in said clearance causes oscillation of the band which in turn causes displacement pumping towards the oil side of the shaft.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: March 28, 1989
    Assignee: George Angus & Company Limited
    Inventor: David E. Johnston
  • Patent number: 4799693
    Abstract: A face seal has a sealing ring (7) with a frusto-conical margin (12) diverging from the plane of the contact band (8), so as to define a sealing region (13) which enlarges toward the sealed side "S," and a peripheral shoulder (14) which has a non-constant axial clearance from the counter-face to produce liquid pulsation which slightly reciprocates the sealing ring to effect, by displacement pumping, positive action toward the sealed side.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: January 24, 1989
    Assignee: George Angus & Company Limited
    Inventor: David E. Johnston