Granted Patent
Utility
US 4,714,118 · App. 06/866,241
Technique for steering and monitoring the orientation of a powered underground boring device
Inventors:
Glen Baker, Albert W. Chau, John E. Mercer
Patented Case
View Patent ↗
Granted: Dec 22, 1987
Filed: May 22, 1986
Inventors
Glen Baker
Albert W. Chau
John E. Mercer
Assignee (at issue)
FlowMole Corporation
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.