Granted Patent
Utility
US 5,453,149 · App. 07/652,132
Improved process for effecting electromagnetic bonding of plastic parts
Inventor:
Robert Szczesniak
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Feb 7, 1991
Inventor
Robert Szczesniak
Assignee (at issue)
Ashland Oil, 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.