Patents by Inventor Chen Huei-Chin

Chen Huei-Chin 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).

  • Surveying method allowing greater freedom in positioning the surveying instruments
    Patent number: 4839967
    Abstract: A method for surveying in which the surveying instrument may be positioned in substantially more locations than with prior art surveying methods. The surveying method employs a separate point at which a compass is positioned. The bearing of the object to be located relative to the compass is measured. The distance between a surveying instrument and this object is determined by setting the bearing of the surveying instrument equal to the bearing of the compass, measuring the distance between the compass and the surveying instrument, measuring the angle formed between the compass and surveying instrument and object and instrument, and then determining the distance between the surveying instrument and object using trigonometric principles.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: June 20, 1989
    Inventor: Chen Huei-Chin