Patents by Inventor Samuel Y. Yu

Samuel Y. Yu 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: 8533414
    Abstract: These embodiments relate to authentication and securing of write-once, read-many (WORM) memory devices. In one embodiment, a memory device comprises a controller operable in first and second modes of operation after stored security information is validated, wherein in the first mode of operation, the memory device operates in a read-only mode, and wherein in the second mode of operation, the memory device operates in a write-once, read-many (WORM) mode. In another embodiment, the controller is operative to perform security methods.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 10, 2013
    Assignee: SanDisk Technologies Inc.
    Inventors: Samuel Y. Yu, Christopher S. Moore, Jason S. Whetstone, Ron Barzilai, Hironaga Ino
  • Patent number: 8504763
    Abstract: One-time programmable (OTP) and write-once read-many (WORM) memory devices and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device. These embodiments can also be used to prevent accidental or deliberate overwrites, changes, or deletions to existing data in a WORM memory device.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: August 6, 2013
    Assignee: SanDisk Technologies Inc.
    Inventors: Richard Matthew Fruin, Christopher S. Moore, Samuel Y. Yu
  • Publication number: 20120303881
    Abstract: One-time programmable (OTP) and write-once read-many (WORM) memory devices and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device. These embodiments can also be used to prevent accidental or deliberate overwrites, changes, or deletions to existing data in a WORM memory device.
    Type: Application
    Filed: August 10, 2012
    Publication date: November 29, 2012
    Inventors: Richard Matthew Fruin, Christopher S. Moore, Samuel Y. Yu
  • Publication number: 20120278546
    Abstract: These embodiments relate to authentication and securing of write-once, read-many (WORM) memory devices. In one embodiment, a memory device comprises a controller operable in first and second modes of operation after stored security information is validated, wherein in the first mode of operation, the memory device operates in a read-only mode, and wherein in the second mode of operation, the memory device operates in a write-once, read-many (WORM) mode. In another embodiment, the controller is operative to perform security methods.
    Type: Application
    Filed: July 13, 2012
    Publication date: November 1, 2012
    Inventors: Samuel Y. Yu, Christopher S. Moore, Jason S. Whetstone, Ron Barzilai, Hironaga Ino
  • Patent number: 8266366
    Abstract: One-time programmable (OTP) and write-once read-many (WORM) memory devices and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device. These embodiments can also be used to prevent accidental or deliberate overwrites, changes, or deletions to existing data in a WORM memory device.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: September 11, 2012
    Assignee: SanDisk Technologies, Inc.
    Inventors: Richard Matthew Fruin, Christopher S. Moore, Samuel Y. Yu
  • Patent number: 8255655
    Abstract: These embodiments relate to authentication and securing of write-once, read-many (WORM) memory devices. In one embodiment, a memory device comprises a controller operable in first and second modes of operation after stored security information is validated, wherein in the first mode of operation, the memory device operates in a read-only mode, and wherein in the second mode of operation, the memory device operates in a write-once, read-many (WORM) mode. In another embodiment, the controller is operative to perform security methods.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: August 28, 2012
    Assignee: SanDisk Technologies Inc.
    Inventors: Samuel Y. Yu, Christopher S. Moore, Jason S. Whetstone, Ron Barzilai, Hironaga Ino
  • Publication number: 20110082966
    Abstract: These embodiments relate to authentication and securing of write-once, read-many (WORM) memory devices. In one embodiment, a memory device comprises a controller operable in first and second modes of operation after stored security information is validated, wherein in the first mode of operation, the memory device operates in a read-only mode, and wherein in the second mode of operation, the memory device operates in a write-once, read-many (WORM) mode. In another embodiment, the controller is operative to perform security methods.
    Type: Application
    Filed: October 2, 2009
    Publication date: April 7, 2011
    Inventors: Samuel Y. Yu, Christopher S. Moore, Jason S. Whetstone, Ron Barzilai, Hironaga Ino
  • Publication number: 20100017558
    Abstract: A one-time programmable (OTP) memory device and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device.
    Type: Application
    Filed: April 9, 2009
    Publication date: January 21, 2010
    Inventors: Richard Matthew Fruin, Christopher S. Moore, Samuel Y. Yu
  • Publication number: 20100017559
    Abstract: One-time programmable (OTP) and write-once read-many (WORM) memory devices and methods for use therewith are provided. These embodiments can be used to provide compatibility between a memory device that uses an OTP (or few-time programmable (FTP)) memory array and host devices that use a file system, such as the DOS FAT file system, that expects to be able to rewrite to a memory address in the memory device. These embodiments can also be used to prevent accidental or deliberate overwrites, changes, or deletions to existing data in a WORM memory device.
    Type: Application
    Filed: April 9, 2009
    Publication date: January 21, 2010
    Inventors: Richard Matthew Fruin, Christopher S. Moore, Samuel Y. Yu