Granted Patent
Utility
US 4,529,148 · App. 06/579,778
Roll of wound conduit tubing with prethreaded pull line
Inventors:
Donald N. Hesprich, William P. Ware
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Feb 13, 1984
Inventors
Donald N. Hesprich
William P. Ware
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.