Patents by Inventor Alfred M. Blanchette

Alfred M. Blanchette 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).

  • Formula processor having cache means for storing and retrieving results of previously computed formulas based on identification and dependency information
    Patent number: 5862400
    Abstract: A formula processor which computes results for a group of formulas in which at least one formula uses the result of another formula. The formula processor receives the formulas from a host and returns computed results for the formulas to the host for storage in a main memory. Formulas are received as a sequence of tokens, each token describing operands or operations. The formula processor is pipelined; as one token is interpreted and processed by the formula processor, subsequent tokens are received. The formula processor uses a computation element which is capable of performing only certain operations; before attempting each operation described by a token, the computation element determines whether the operation can be performed by the computation element--if it can be performed, it is; otherwise, the host may perform the operation itself, or rewrite the operation so the formula processor can perform it. After the formula processor computes a result for a formula, it stores this result in a cache memory.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: January 19, 1999
    Assignee: Lotus Development Corp.
    Inventors: David Reed, Alfred M. Blanchette
  • Formula processor having cache means for storing and retrieving results of previously computed formulas base on identification and dependency informations
    Patent number: 5819102
    Abstract: A formula processor which computes results for a group of formulas in which at least one formula uses the result of another formula. The formula processor receives the formulas from a host and returns computed results for the formulas to the host for storage in a main memory. Formulas are received as a sequence of tokens, each token describing operands or operations. The formula processor is pipelined; as one token is interpreted and processed by the formula processor, subsequent tokens are received. The formula processor uses a computation element which is capable of performing only certain operations; before attempting each operation described by a token, the computation element determines whether the operation can be performed by the computation element--if it can be performed, it is; otherwise, the host may perform the operation itself, or rewrite the operation so the formula processor can perform it. After the formula processor computes a result for a formula, it stores this result in a cache memory.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: October 6, 1998
    Assignee: Lotus Corporation
    Inventors: David Reed, Alfred M. Blanchette