Patents by Inventor Frans van den Dool

Frans van den Dool 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 for transmitting, via a plurality of asynchronously time-divided transmission channels, a flow of data cells, the state of a counter for each transmission channel being kept up to date in accordance with the number of data cells per unit of time
    Patent number: 5007043
    Abstract: The flow of data cells through a transmission medium with a plurality of virtual, asynchronously time-divided transmission channels is protected against excessive crowding of data cells in any channel, or of any customer, by means of a counter for each channel and the recording of the time or arrival of data cells in each channel. The counter is advanced by a predetermined amount at the arrival of each data cell and in the same operation is decreased by a value which is a function of the length of time between the moment of arrival of that data cell and the moment of arrival of a preceding data cell with the same channel designation. The state of the counter is also compared with a threshold value which, if equalled or exceeded results in the data cell not being switched through a switch controlled by the comparison, while in other cases the data cell is let through to the downstream portion of the channel.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: April 9, 1991
    Assignee: Koninklijke PTT Nederland N.V.
    Inventors: Frans van den Dool, Jacob C. van der Wal