Patents by Inventor Chian-Hwa Wu

Chian-Hwa Wu 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).

  • Variable lens assembly
    Patent number: 5233470
    Abstract: Disclosed is a variable lens assembly having a water chamber defined with a front lens holder between two flexible, transparent diaphragms and filled with a fluid, and a syringe connected to the front lens holder and controlled to vary the volume of the water chamber. The diaphragms are stretched to curve outwards and form into a biconvex lens as the plunger of the syringe is pushed forwards in compressing the fluid; the diaphragms are induced to curve inwards and form into a biconcave lens as the plunger of the syringe is pulled backwards in releasing the fluid.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: August 3, 1993
    Assignee: Hsin Yi Foundation
    Inventor: Chian-Hwa Wu