Patents by Inventor Lawrence R. Hanlon

Lawrence R. Hanlon 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: 5132879
    Abstract: A system of interconnecting electrical components having conflicting bonding requirements for mounting the components to a printed circuit board. The system includes a primary printed circuit board having a pattern of through-holes and having arrangements of connection sites to receive electrical components. For example, the connection sites of the primary printed circuit board may be of the type to receive components associated with the bonding requirements of surface mounting. A secondary printed circuit board has a pattern of through-holes corresponding to the pattern of through-holes of the primary printed circuit board. The circuit boards are wave soldered or surface mounted together by means of the corresponding patterns of through-holes. Attached to the secondary printed circuit board is one or more electrical component having bonding requirements which conflict with those of the primary printed circuit board.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: July 21, 1992
    Assignee: Hewlett-Packard Company
    Inventors: Cheng-Cheng Chang, Lawrence R. Hanlon
  • Patent number: 4939694
    Abstract: A self-testing and self-repairing memory system is presented as well as a method for using it and a method for making it. This memory system is constructed from memory chips that have passed an abbreviated wafer probe test. After the memory system is assembled, it tests itself to locate defective memory cells. The memory system may decide to correct these defective memory cells or it may decide to correct them using an error correction code engine. This memory system tests itself during field use to locate defective memory cells. Once these defective memory cells are located, the memory system uses the error correction code engine to correct these defective memory cells. When the error correction code engine becomes overburdened with defective memory cells, then the memory system replaces these defective memory cells.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: July 3, 1990
    Assignee: Hewlett-Packard Company
    Inventors: Steven G. Eaton, Lawrence R. Hanlon, Marvin S. Keshner
  • Patent number: 4455561
    Abstract: A new type of thermal ink jet print head is provided which is driven by an electron beam. The print head is constructed of an electron permeable thin film (electron window) which in one embodiment, has on one of its surfaces a plurality of electron absorbing (heater) pads that are in thermal contact with an ink reservoir. As electrons from a CRT traverse the thin film and are absorbed by a pad, they introduce an extremely large and rapid temperature increase in the pad. As a result, a sufficient amount of thermal energy is absorbed by the ink to cause a vapor explosion within the ink, thereby ejecting ink droplets from a nearby orifice in the ink reservoir. In another embodiment, the electrons traverse the window and are absorbed in the ink rather than in pads, and in another embodiment the electrons are absorbed directly in the window itself.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: June 19, 1984
    Assignee: Hewlett-Packard Company
    Inventors: James H. Boyden, Donald R. Bradbury, Garrett A. Garrettson, Timothy R. Groves, Lawrence R. Hanlon, Armand P. Neukermans