Patents by Inventor Tak K. Wong

Tak K. Wong 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: 5206159
    Abstract: Substantially spherical polymer particles containing a colloidally, stably and uniformly dispersed magnetically responsive substance of about 5 nm to about 500 nm in diameter provide a superparamagnetic reagent carrier. Preferably, the polymer particles have a hydrated diameter of about 0.5 to 100 um, the polymer is a non-ionic cross-linked polyacrylamide gel and the magnetically responsive substance is iron oxide granules. The magnetically responsive substance may be present in an amount so that the polymer particles have a specific gravity of between 1.2 and 2.7. The reagent carrier is prepared by swelling polymer particles in a solution of iron salt so that substantially all of the iron salt solution is taken upon by the polymer particles and then converting the iron salt in situ to insoluble colloidally dispersed iron oxide granules.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: April 27, 1993
    Assignee: Miles Inc., as Legal Successor by Merger with Technicon Instruments Corp.
    Inventors: Beri Cohen, Tak K. Wong, Bartholomew Hargitay
  • Patent number: 4884989
    Abstract: A toy which is capable of moving on a substantially vertical surface and which is provided with separated regions of a sticky material, the regions defining at least two planes in which the toy can rotate or tumble, which planes are non-parallel to each other. Preferably the toy has two parts pivotably connected together with each part bearing separated regions of the sticky material, whereby axes of rotation defined by respective pairs of the regions can be moved relative to each other.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: December 5, 1989
    Assignee: T. K. Wong & Associates, Ltd.
    Inventor: Tak K. Wong