Patents by Inventor Bernard P. Hildebrand

Bernard P. Hildebrand 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).

  • Nondestructive ultrasonic testing of materials
    Patent number: 5335184
    Abstract: Reflection wave forms obtained from aged and unaged material samples can be compared in order to indicate trends toward age-related flaws. Statistical comparison of a large number of data points from such wave forms can indicate changes in the microstructure of the material due to aging. The process is useful for predicting when flaws may occur in structural elements of high risk structures such as nuclear power plants, airplanes, and bridges.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: August 2, 1994
    Assignee: Battelle Memorial Institute
    Inventor: Bernard P. Hildebrand
  • Holographic projection screen
    Patent number: 4500163
    Abstract: A projection screen is formed as at least one reflective holograms each of which, when referenced with a projector, reconstructs a defined observation pupil.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: February 19, 1985
    Assignee: The Singer Company
    Inventors: Richard H. Burns, William M. Hall, Bernard P. Hildebrand
  • Method of manufacturing and utilizing holographic lens means
    Patent number: 4133600
    Abstract: Holographic lenses are formed on a substantially transparent scanning disc wherein a line focus is the object for each hologram. Such hologram is then used to reconstruct the line focus at the location of the record to be scanned, thereby alleviating tolerance requirements in regard to the positioning or flatness of the scanned record.
    Type: Grant
    Filed: October 1, 1976
    Date of Patent: January 9, 1979
    Assignee: Eli S. Jacobs
    Inventors: James T. Russell, Bernard P. Hildebrand
  • Eddy current nondestructive testing device for measuring variable characteristics of a sample utilizing Walsh functions
    Patent number: 4084136
    Abstract: An eddy current testing device for measuring variable characteristics of a sample generates a signal which varies with variations in such characteristics. A signal expander samples at least a portion of this generated signal and expands the sampled signal on a selected basis of square waves or Walsh functions to produce a plurality of signal components representative of the sampled signal. A network combines these components to provide a display of at least one of the characteristics of the sample.
    Type: Grant
    Filed: October 21, 1976
    Date of Patent: April 11, 1978
    Assignee: Battelle Memorial Institute
    Inventors: Hugo L. Libby, Bernard P. Hildebrand
  • Lens testing using total internal reflection holography
    Patent number: 3997266
    Abstract: Accurate, rapid and inexpensive testing and inspecting of lens surfaces tugh holographic means requiring no beamsplitters, mirrors or overpower optics, and wherein a hologram formed in accordance with one aspect of the invention contains the entire interferometer and serves as both a master and illuminating source for both concave and convex surfaces to be so tested.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: December 14, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Bernard P. Hildebrand
  • Testing and inspecting lens by holographic means
    Patent number: 3953129
    Abstract: Processes for the accurate, rapid and inexpensive testing and inspecting of oncave and convex lens surfaces through holographic means requiring no beamsplitters, mirrors or overpower optics, and wherein a hologram formed in accordance with one aspect of the invention contains the entire interferometer and serves as both a master and illuminating source for both concave and said convex surfaces to be so tested.
    Type: Grant
    Filed: January 9, 1975
    Date of Patent: April 27, 1976
    Assignee: The Unites States of America as represented by the Secretary of the Army
    Inventor: Bernard P. Hildebrand