Patents by Inventor Lim Ching Hwa

Lim Ching Hwa 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).

  • Methods and equipment for testing reflection points of transmission lines
    Patent number: 4041381
    Abstract: A method of determining a parameter related to reflection in a transmission line said method consisting in repeatedly transmitting into said line a digital word which is a predetermined number of digital bits in length; receiving said words after reflection back from the point of reflection; repeatedly producing similar digital words, each of the aforesaid number of bits in length; delaying said similar words by a series of steps of time delay, each step occurring after a predetermined number of repetitions of said similar words; and utilizing the occurrence of correlation between received reflected words and delayed similar words to determine the said parameter.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: August 9, 1977
    Inventor: Lim Ching Hwa