Patents by Inventor Jem D. Lu

Jem D. Lu 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).

  • Structure of world time clock for 24-hour indication
    Patent number: 5107468
    Abstract: Disclosed is a world time clock, which has an hour plate designed to rotate at a constant speed of 24 hours for one turn. The hour plate is printed with the official name of world important countries according to world time zone classification so that every local time is shown while the hour plate is carried to rotate on a fixed plate which has graduations for indication of hour, minute and second. As an alternate form of the present invention, an hour plate is printed or engraved with graduations to match with a face plate, which is printed with the official name of world important countries according to world time zone classification, for world time indication.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: April 21, 1992
    Inventor: Jem D. Lu