Patents by Inventor Long V. Pham

Long V. Pham 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).

  • Method and apparatus for visual verification of proper assembly and alignment of layers in a multi-layer printed circuit board
    Patent number: 5266380
    Abstract: A printed circuit (pc) board (105) having at least two layers, wherein proper assembly and alignment of the at least two layers may be visually verified, comprises a first layer (410) having a first printed circuit pattern (305) formed thereon, the first printed circuit pattern (305) including a first identifier (115) formed along at least one edge (405) of the first layer (410). The pc board (105) further comprises a second layer (420) having a second printed circuit pattern (305) formed thereon, the second printed circuit pattern (305) including a second identifier (120) formed along at least one edge (405) of the second layer (420), the second identifier (120) being visibly aligned with the first identifier (115) in a predetermined alignment to indicate that the first layer (410) and the second layer (420) are correctly laminated.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: November 30, 1993
    Assignee: Motorola, Inc.
    Inventors: Anthony J. Renguso, Long V. Pham, Tuan K. Nguyen, Basil P. Pappademetriou