Granted Patent
Utility
US 4,580,348 · App. 06/588,325
Method of gaging a pipe at multiple locations
Inventors:
William L. De Boynton, Frederick C. Lee, Bruce E. Wilson, John F. O'Rourke
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Mar 12, 1984
Inventors
William L. De Boynton
Frederick C. Lee
Bruce E. Wilson
John F. O'Rourke
Assignee (at issue)
Hydril Company
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.