Granted Patent
Utility
US 4,596,381 · App. 06/150,969
Apparatus and method for installing line in conduit
Inventor:
James C. Hamrick
Patented Case
View Patent ↗
Granted: Jun 24, 1986
Filed: May 19, 1980
Inventor
James C. Hamrick
Assignee (at issue)
THOMAS INDUSTRIES, 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.