Patents by Inventor Etelvino Teixeira Coelho

Etelvino Teixeira Coelho 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).

  • Presbyopia correction using a protected space pattern, methods and apparatus
    Patent number: 5803923
    Abstract: A zone of increased curvature is produced in the inferior lower quadrants of the cornea FIG. 1 (5). This zone produces a "plus effect" FIG. 2 (5) which leads presbyopia patients to be able to read from near distance again. Such effect is achieved using photoablitive techniques and fixation, patterns, and apparatus specially designed.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: September 8, 1998
    Assignee: Jugvir I. Singh-Derewa
    Inventors: Jugvir Inder Singh-Derewa, Heraldo Sa Martins, Etelvino Teixeira Coelho