Granted Patent
Utility
US 5,186,033 · App. 07/804,887
Apparatus and method for forming external raised beads on hollow tubing
Inventor:
Alex Nieczyporowicz
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Dec 6, 1991
Inventor
Alex Nieczyporowicz
Assignee (at issue)
Earl's Supply Co.
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.