Granted Patent
Utility
US 5,980,674 · App. 08/798,952
Method for manufacturing tubular constructions from fiber reinforced thermoplastic sheets
Inventor:
George W. Burger
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Feb 11, 1997
Inventor
George W. Burger
Assignee (at issue)
Hillerich & Bradsby 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.