Patents by Inventor Stewart M. Clamen

Stewart M. Clamen 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).

  • System for modifying a database using a transaction log
    Patent number: 6418455
    Abstract: The present invention is a computer system for modifying a database which comprises a computer that modifies records stored in a database. In the process for modifying records in the database, addresses to memory locations in a disk storage unit are accessed during the commit phase by first checking the address space in a transaction log. The computer system of the present invention operates by committing transactions without locking out readers. This is possible because any changed data in the database is reflected in the transaction log and the log must be accessed prior to reading from the disk storage unit. As a result, the user sees changed data when the log is accessed, or if data has not been changed, the log merely directs the computer to the address in the original database storage where unchanged data is stored.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: July 9, 2002
    Assignee: Claritech Corporation
    Inventors: Michael L. Horowitz, Michael J. McInerny, Stewart M. Clamen
  • System for modifying a database using a transaction log
    Patent number: 6134562
    Abstract: The present invention is a computer system for modifying a database which comprises a computer that modifies records stored in a database. In the process for modifying records in the database, addresses to memory locations in a disk storage unit are accessed during the commit phase by first checking the address space in a transaction log. The computer system of the present invention operates by committing transactions without locking out readers. This is possible because any changed data in the database is reflected in the transaction log and the log must be accessed prior to reading from the disk storage unit. As a result, the user sees changed data when the log is accessed, or if data has not been changed, the log merely directs the computer to the address in the original database storage where unchanged data is stored.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: October 17, 2000
    Assignee: Claritech Corporation
    Inventors: Michael L. Horowitz, Michael J. McInerny, Stewart M. Clamen
  • System for modifying a database using a transaction log
    Patent number: 5953728
    Abstract: The present invention is a computer system for modifying a database which comprises a computer that modifies records stored in a database. In the process for modifying records in the database, addresses to memory locations in a disk storage unit are accessed during the commit phase by first checking the address space in a transaction log. The computer system of the present invention operates by committing transactions without locking out readers. This is possible because any changed data in the database is reflected in the transaction log and the log must be accessed prior to reading from the disk storage unit. As a result, the user sees changed data when the log is accessed, or if data has not been changed, the log merely directs the computer to the address in the original database storage where unchanged data is stored.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: September 14, 1999
    Assignee: Claritech Corporation
    Inventors: Michael L. Horowitz, Michael J. McInerny, Stewart M. Clamen