Patents by Inventor Petr Zdrahal

Petr Zdrahal 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).

  • Communication between client and server computers via http, method, computer program product and system
    Patent number: 7606901
    Abstract: A client computer and a server computer communicate via HTTP. The client computer uses a standard HTTP-browser. Substantially simultaneously with establishing a session by allocating a resource at the server computer, the server computer sends a termination instruction to the browser. The instruction remains unexecuted in the browser during the whole session. In the event that the server computer terminates the session (such as upon unloading the instruction from the browser), the browser causes the server computer to de-allocate the resource.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 20, 2009
    Assignee: SAP AG
    Inventors: Juergen Heymann, Udo Offermann, Petr Zdrahal