Patents by Inventor David F. Windsor

David F. Windsor 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: 4078250
    Abstract: Linear domain numbers are converted into standard characteristic-mantissa format by left shifting the leading zeros out of the mantissa portion and into the characteristic portion. The resulting normalized mantissa M is separated into a MSB portion m and a LSB portion n: whereM= m + n,andm >> nto accomodate the approximate relationshipLog (M) .perspectiveto. log term + correction term .perspectiveto. Log (m) + 2n/2m' + nwhere m' = the MSB portion of m.Look up tables are provided for supplying the two terms for each mantissa received. The digital radar landmass systems then performs computations using the approximate logs. The answers are returned to the linear domain by an antilog circuit.
    Type: Grant
    Filed: June 4, 1976
    Date of Patent: March 7, 1978
    Assignee: The Singer Company
    Inventors: David F. Windsor, Kanwalnain S. Rekhi