Patents by Inventor Berhau Iman

Berhau Iman 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).

  • Moving sectors within a block of information in a flash memory mass storage architecture
    Patent number: 6145051
    Abstract: A device is disclosed for storing mapping information for mapping a logical block address identifying a block being accessed by a host to a physical block address, identifying a free area of nonvolatile memory, the block being selectively erasable and having one or more sectors that may be individually moved. The mapping information including a virtual physical block address for identifying an "original" location, within the nonvolatile memory, wherein a block is stored and a moved virtual physical block address for identifying a "moved" location, within the nonvolatile memory, wherein one or more sectors of the stored block are moved. The mapping information further including status information for use of the "original" physical block address and the "moved" physical block address and for providing information regarding "moved" sectors within the block being accessed.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: November 7, 2000
    Assignee: Lexar Media, Inc.
    Inventors: Petro Estakhri, Berhau Iman, Ali R. Ganjuei
  • Identification and verification of a sector within a block of mass storage flash memory
    Patent number: 6128695
    Abstract: A method and apparatus is disclosed for identifying a block being stored within flash memory devices using a cluster address for each block, the block being selectively erasable and having one or more sectors, the cluster address being stored in one of the sectors of the block. In an alternative embodiment, the cluster address is stored in at least two different sectors within the same block for ensuring that the information last written to the block is valid. Further disclosed is a novel way to use a defect flag for each block stored within the flash memory device for efficiently identifying non-defective blocks upon system power-up.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: October 3, 2000
    Assignee: Lexar Media, Inc.
    Inventors: Petro Estakhri, Berhau Iman
  • Moving sectors within a block of information in a flash memory mass storage architecture
    Patent number: 5907856
    Abstract: A device is disclosed for storing mapping information for mapping a logical block address identifying a block being accessed by a host to a physical block address, identifying a free area of nonvolatile memory, the block being selectively erasable and having one or more sectors that may be individually moved. The mapping information including a virtual physical block address for identifying an "original" location, within the nonvolatile memory, wherein a block is stored and a moved virtual physical block address for identifying a "moved" location, within the nonvolatile memory, wherein one or more sectors of the stored block are moved. The mapping information further including status information for use of the "original" physical block address and the "moved" physical block address and for providing information regarding "moved" sectors within the block being accessed.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: May 25, 1999
    Assignee: Lexar Media, Inc.
    Inventors: Petro Estakhri, Berhau Iman, Ali R. Ganjuei
  • Identification and verification of a sector within a block of mass storage flash memory
    Patent number: 5838614
    Abstract: A method and apparatus is disclosed for identifying a block being stored within flash memory devices using a cluster address for each block, the block being selectively erasable and having one or more sectors, the cluster address being stored in one of the sectors of the block. In an alternative embodiment, the cluster address is stored in at least two different sectors within the same block for ensuring that the information last written to the block is valid. Further disclosed is a novel way to use a defect flag for each block stored within the flash memory device for efficiently identifying non-defective blocks upon system power-up.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: November 17, 1998
    Assignee: Lexar Microsystems, Inc.
    Inventors: Petro Estakhri, Berhau Iman