Patents by Inventor Christina Ma

Christina Ma 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).

  • Medical implant detachment systems and methods
    Patent number: 8974513
    Abstract: An implant assembly comprises an elongated pusher member, and an implantable device (e.g., a vaso-occlusive device) mounted to the distal end of the pusher member. The implant assembly further comprises an electrolytically severable joint disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed, and a return electrode carried by the distal end of the pusher member (e.g., a coil disposed about the pusher member) in proximity to, but electrically isolated from, the severable joint. The implant assembly further comprises a terminal carried by the proximal end of the pusher member in electrical communication with the severable joint.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: March 10, 2015
    Assignees: Stryker Corporation, Stryker NV Operations Limited
    Inventors: Russell Ford, Scott McGill, Clifford Teoh, Michael Williams, Kamal Ramzipoor, Like Que, Ann Huang, Elena Oo, Christina Ma, Stella Chu
  • MEDICAL IMPLANT DETACHMENT SYSTEMS AND METHODS
    Publication number: 20120271344
    Abstract: An implant assembly comprises an elongated pusher member, and an implantable device (e.g., a vaso-occlusive device) mounted to the distal end of the pusher member. The implant assembly further comprises an electrolytically severable joint disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed, and a return electrode carried by the distal end of the pusher member (e.g., a coil disposed about the pusher member) in proximity to, but electrically isolated from, the severable joint. The implant assembly further comprises a terminal carried by the proximal end of the pusher member in electrical communication with the severable joint.
    Type: Application
    Filed: July 2, 2012
    Publication date: October 25, 2012
    Applicants: STRYKER NV OPERATIONS LIMITED, STRYKER CORPORATION
    Inventors: Russell FORD, Scott MCGILL, Clifford TEOH, Michael WILLIAMS, Kamal RAMZIPOOR, Like QUE, Ann HUANG, Elena OO, Christina MA, Stella CHU
  • Medical implant detachment systems and methods
    Patent number: 8221483
    Abstract: An implant assembly comprises an elongated pusher member, and an implantable device (e.g., a vaso-occlusive device) mounted to the distal end of the pusher member. The implant assembly further comprises an electrolytically severable joint disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed, and a return electrode carried by the distal end of the pusher member (e.g., a coil disposed about the pusher member) in proximity to, but electrically isolated from, the severable joint. The implant assembly further comprises a terminal carried by the proximal end of the pusher member in electrical communication with the severable joint.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: July 17, 2012
    Assignees: Stryker Corporation, Stryker NV Operations Limited
    Inventors: Russell Ford, Scott McGill, Clifford Teoh, Michael Williams, Kamal Ramzipoor, Like Que, Ann Huang, Elena Oo, Christina Ma, Stella Chu
  • MEDICAL IMPLANT DETACHMENT SYSTEMS AND METHODS
    Publication number: 20090062726
    Abstract: An implant assembly comprises an elongated pusher member, and an implantable device (e.g., a vaso-occlusive device) mounted to the distal end of the pusher member. The implant assembly further comprises an electrolytically severable joint disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed, and a return electrode carried by the distal end of the pusher member (e.g., a coil disposed about the pusher member) in proximity to, but electrically isolated from, the severable joint. The implant assembly further comprises a terminal carried by the proximal end of the pusher member in electrical communication with the severable joint.
    Type: Application
    Filed: May 16, 2008
    Publication date: March 5, 2009
    Applicant: Bsoton Scientific Scimed, Inc.
    Inventors: Russell Ford, Scott McGill, Clifford Teoh, Michael Williams, Kamal Ramzipoor, Like Que, Ann Huang, Elena Oo, Christina Ma, Stella Chu
  • Method of determining inventory levels
    Publication number: 20030061126
    Abstract: Optimum inventory levels are determined for parts in a network of neighboring part facilities serving a plurality of customers. A part procurement time performance measure is met or exceeded while minimizing overall inventory cost including holding, handling, and transportation costs. Alternatively an upper bound on inventory cost is met while maximizing a part procurement time measure.
    Type: Application
    Filed: June 12, 2001
    Publication date: March 27, 2003
    Applicant: International Business Machines Corporation
    Inventors: Yesim Erke, Yi-Hui Christina Ma, Mark C. Booth