Patents by Inventor Harri O. Vaarala

Harri O. Vaarala 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).

  • Detection by a scanner of radiation from the scanner reflected from a bar code
    Patent number: 5602378
    Abstract: The invention relates to a method for the detection of imprint markings (6) made into an object, especially for reading a bar code, the markings (6, 6a) of which are formed into a second level (8) which differs from the surface level (4) of the object, the second level (8) being arranged to reflect a radiation (5) to at least some extent. The method utilizes apparatus which transmit (1) and receive (2) a radiation, the apparatus being separated from each other by a separating wall (3) which is arranged transversely with respect to the surface plane of the object and near the surface (4), the wall preventing radiation from passing from the transmitting (1) to the receiving apparatus (2) at such locations where the surface (4), which is at a higher lever, extends to an edge (7) of the separating wall (3).
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: February 11, 1997
    Inventor: Harri O. Vaarala