Patents by Inventor Didier Jan

Didier Jan 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).

  • Method of improving the restoration of images supplied by a lateral sonar and a device for implementing same
    Patent number: 4675853
    Abstract: A method and device for improving the restoration of the images obtained from samples taken from acoustic signals received by a lateral aimed sonar provides for the selection of samples from the signals received, the time interval between the samples selected being smaller at the beginning of the echo reception window than at the end thereof so as to improve the power of resolution of the sonar for directions of low obliqueness. The sampling may be carried out at a variable frequency or else at a very high fixed frequency, the selection then being made among all the samples obtained.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: June 23, 1987
    Assignee: Institut Francais Du Petrole
    Inventors: Aline Bourgeois, Didier Jan