Granted Patent
Utility
US 5,651,638 · App. 08/522,594
Method and apparatus for controlling the position and operation of equipment within a pipeline
Inventor:
Beverley Clarence Heggerud
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Sep 1, 1995
Inventor
Beverley Clarence Heggerud
Assignee (at issue)
CRC-EVANS PIPELINE INTERNATIONAL, INC.
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.