Granted Patent
Utility
US 4,413,370 · App. 06/293,084
Unitary pig for use in a pipeline
Inventors:
Larry D. Payne, Hyun Je Cho, Kishor N. Mehta
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Aug 17, 1981
Inventors
Larry D. Payne
Hyun Je Cho
Kishor N. Mehta
Assignee (at issue)
T.D. WILLIAMSON
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.