Patents by Inventor Derek Theodorus Pater

Derek Theodorus Pater 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).

  • Patent number: 7739806
    Abstract: A combination measuring tool includes a main body having a first portion having a plurality of first graduations and a second portion having a plurality of second graduations, a transverse bar movably and rotatably mounted on the main body and having a semi-circular protrusion having a plurality of angle scales, a protractor secured to the transverse bar and having a plurality of angle scales, a pivot plate pivotally mounted on the protractor, and a ruler movably mounted on the main body and having a plurality of graduations. Thus, the measuring and drawing angle of the combination measuring tool can be adjusted easily and freely, thereby facilitating a user operating the combination measuring tool to draw marking lines.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: June 22, 2010
    Assignees: Nedful Products Co., Ltd., Qualipro Enterprise Co., Ltd.
    Inventor: Derek Theodorus Pater