Patents by Inventor A. Donn Cobb

A. Donn Cobb 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: 4042904
    Abstract: An acoustic navigation system for marking channels is utilized for provid safe entry and exit from harbors. The system has a plurality of pairs of acoustic projectors aligned on opposite sides of a channel. Each pair is spaced from corresponding pairs, a predetermined distance along the sides of the channel. A first projector in each pair provides an acoustic source for a period of time. The other projector in the pair provides acoustic sources spaced at predetermined intervals both before and after the signal from the first projector. A vessel equipped with receiving and display equipment determines its own location within the channel from the received acoustic signals.
    Type: Grant
    Filed: September 1, 1976
    Date of Patent: August 16, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: A. Donn Cobb