Granted Patent
Utility
US 6,003,376 · App. 09/096,422
Acoustic system for measuring the location and depth of underground pipe
Inventors:
Alan Alexander Burns, Gary Alan Hayter, Stephanie Griffin, Joseph W. Maresca, Jr.
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Jun 11, 1998
Inventors
Alan Alexander Burns
Gary Alan Hayter
Stephanie Griffin
Joseph W. Maresca, Jr.
Assignee (at issue)
VISTA RESEARCH GROUP, LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.