Patents by Inventor Sheldon Chang

Sheldon Chang 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: 20170264578
    Abstract: Systems and methods are provided for receiving, at a first computing device, a request from a user to activate a new media collection, sending, by the first computing device, the request to a server computer for activation of the new media collection, receiving, by the first computing device, confirmation that the new media collection was activated, receiving, at the first computing device, a plurality of content messages associated with the new media collection, receiving, at the first computing device, from the user, a selection of the plurality of content messages to be included in the new media collection, sending, to the server computer, an indication of the selection of the content messages to be included in the new media collection, wherein the server computer causes the selection of content messages to be included in the new media collection and displayed in response to a request from at least a second computing device to view the new media collection.
    Type: Application
    Filed: February 26, 2016
    Publication date: September 14, 2017
    Inventors: Nicholas Richard Allen, Sheldon Chang, Maria Pavlovskaia, Amer Shahnawaz, Jianchao Yang
  • Publication number: 20170263030
    Abstract: Systems and methods are provided for receiving, at a server computer, a plurality of content messages from a plurality of content sources, each content message comprising media content, for each of the plurality of content messages received, associating the media content with a predetermined media collection, and storing the content message in a database. The system and methods further providing for causing the plurality of content messages to be displayed on an operator device with other content messages associated with the media collection, determining that a predetermined trigger related to the media collection has been activated, updating an identifier of the media collection from a first indicator to a second indicator indicating an action needs to be taken on the media collection, and causing the updated identifier with the second indicator to be displayed on an operator device.
    Type: Application
    Filed: February 26, 2016
    Publication date: September 14, 2017
    Inventors: Nicholas Richard Allen, Sheldon Chang, Maria Pavlovskaia, Amer Shahnawaz, Jianchao Yang
  • Patent number: 9754355
    Abstract: Systems and methods for generating and distributing photo filters are described. A photo filter publication application receives filter data and object criteria and generates a photo filter based on the filter data. The photo filter is associated with satisfaction of the object criteria. A photo filter engine then identifies that a client device has taken a photograph. The photo filter engine then provides the photo filter to the client device based on the photograph including an object that satisfies the object criteria. The photo filter may then be displayed as an option on a user interface of the client device. The object criteria may include associations between an object and a source of image data, for example, a brand of a merchant in which case the associated photo filter may include images associated with the brand of the merchant.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: September 5, 2017
    Assignee: SNAP INC.
    Inventors: Sheldon Chang, Chamal Samaranayake, Timothy Michael Sehn, Rong Yan
  • Publication number: 20170249306
    Abstract: Systems and methods are provided for receiving, at a server computer, a plurality of content messages from a plurality of content sources, each content message comprising media content and associated with a predetermined media collection, for each of the plurality of content messages received, analyzing each of the plurality of content messages to determine a quality score for each of the plurality of content messages, and storing each of the plurality of content messages in a database along with the quality score for each of the plurality of content messages.
    Type: Application
    Filed: February 26, 2016
    Publication date: August 31, 2017
    Inventors: Nicholas Richard Allen, Sheldon Chang, Maria Pavlovskaia, Amer Shahnawaz, Jianchao Yang
  • Publication number: 20160277419
    Abstract: A system includes a communication module that receives a request to post content to an event gallery associated with an event. The request in turn includes geo-location data for a device sending the content, and identification data identifying the device or a user of the device. The system further has an event gallery module to perform a first authorization operation that includes determining that the geo-location data corresponds to a geo-location fence associated with an event. The event gallery module also performs a second authorization operation that includes using the identification data to verify an attribute of the user. Finally, based on the first and second authorization operations, the event gallery module may selectively authorize the device to post the content to the event gallery.
    Type: Application
    Filed: March 18, 2016
    Publication date: September 22, 2016
    Inventors: Nicholas Richard Allen, Sheldon Chang
  • Publication number: 20160203586
    Abstract: Systems and methods for generating and distributing photo filters are described. A photo filter publication application receives filter data and object criteria and generates a photo filter based on the filter data. The photo filter is associated with satisfaction of the object criteria. A photo filter engine then identifies that a client device has taken a photograph. The photo filter engine then provides the photo filter to the client device based on the photograph including an object that satisfies the object criteria. The photo filter may then be displayed as an option on a user interface of the client device. The object criteria may include associations between an object and a source of image data, for example, a brand of a merchant in which case the associated photo filter may include images associated with the brand of the merchant.
    Type: Application
    Filed: January 9, 2015
    Publication date: July 14, 2016
    Inventors: Sheldon Chang, Chamal Samaranayake, Timothy Michael Sehn, Rong Yan
  • Publication number: 20160085773
    Abstract: A system and method for geolocation-based pictographs are provided. In example embodiments, a current geolocation of a user device is determined. A pictograph is identified based on the current geolocation of the user device. The identified pictograph is presented on a user interface of the user device.
    Type: Application
    Filed: November 20, 2014
    Publication date: March 24, 2016
    Inventors: Sheldon Chang, Timothy Michael Sehn
  • Publication number: 20160085863
    Abstract: A system and method for a media filter publication application are described. The media filter publication application receives a content item and a selected geolocation, generates a media filter based on the content item and the selected geolocation, and supplies the media filter to a client device located at the selected geolocation.
    Type: Application
    Filed: September 23, 2014
    Publication date: March 24, 2016
    Inventors: Nicholas Richard Allen, Sheldon Chang, Timothy Michael Sehn, William Wu
  • Patent number: 7074018
    Abstract: A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor rotatably disposed within the pump stator, a motor including a motor rotor contained within the pump housing and a direct drive means connected between the motor rotor and an axial shaft of the pump rotor for rotating the pump rotor. The motor rotates the motor rotor, which in turn rotates the pump rotor through the direct drive means. The rotation of the pump rotor within the pump stator forms a plurality of cavities that carry blood forward through the pump housing from the inlet to the outlet as the motor drives the direct drive means.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: July 11, 2006
    Inventor: Sheldon Chang
  • Publication number: 20060089521
    Abstract: A rotor driven linear flow blood pump (LFBP) which completely separates the driving motor from the pumped blood is used as a vascular assist device (VAD). Without the possible hazard of blood contamination, a brushless d. c. motor (BLDC) is ideal to drive and to control the LFBP. Thus we have the best of two worlds: For patient mobility, d. c. batteries are the best as a VAD energy source, and LFBP provides the most means at a physician's disposal for curing his patient with a severely damaged heart. A key to success in making the above possible is a new concept of surface affinity. Complete blood containment is made possible by using a material with zero surface affinity with blood as the bearing material throughout.
    Type: Application
    Filed: October 21, 2004
    Publication date: April 27, 2006
    Inventor: Sheldon Chang
  • Publication number: 20050008509
    Abstract: A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor rotatably disposed within the pump stator, a motor including a motor rotor contained within the pump housing and a direct drive means connected between the motor rotor and an axial shaft of the pump rotor for rotating the pump rotor. The motor rotates the motor rotor, which in turn rotates the pump rotor through the direct drive means. The rotation of the pump rotor within the pump stator forms a plurality of cavities that carry blood forward through the pump housing from the inlet to the outlet as the motor drives the direct drive means.
    Type: Application
    Filed: July 10, 2003
    Publication date: January 13, 2005
    Inventor: Sheldon Chang
  • Patent number: 6305110
    Abstract: A modular neon sign control system with a plurality of discrete neon letters, numbers or symbols, each with plugs to plug into at any place along a continuous electrical rail. Each neon letter, etc. is a single tube having its own driving inverter and digital decoder. Dip switches set a unique digital code into the decoder for each letter. A programmed memory controls a system encoder which sends coded signals to each decoder to compare with each letter's unique code. Those letters receiving the matching digital signals are activated or deactivated according to the program. The letters, etc. of the sign can be operated simultaneously, serially, randomly, in a pattern, or in a flashing manner. Power from an ac adapter is supplied along with the signals from the encoder to the electrical rail, and the decoder separates the power from the coded signals. The letters may be individually and easily prearranged and substituted in a sign.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: October 23, 2001
    Inventor: Sheldon Chang
  • Patent number: 5019764
    Abstract: A lightweight hand-held scanning device for repetitively scanning a laser light source having a laser light generating means and at least one high speed scanning motor controlled by a resonant motor circuit which automatically controls the frequency and amplitude of oscillation of a high speed scanning motor. The frequency and amplitude control is accomplished by using a single feedback signal obtained from the windings of the motor which indicates resonance and which also measures the amplitude of oscillation. The feedback signal obtained is a second harmonic of the driving current. The circuit can be utilized to tune and maintain the motor in a resonant oscillating mode. By controlling both the frequency and amplitude of oscillation the high speed scanning motor can maintain a consistent scanning speed and use less power.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: May 28, 1991
    Assignee: Symbol Technologies, Inc.
    Inventor: Sheldon Chang