Granted Patent
Utility
US 4,923,541 · App. 07/260,866
Method for making composite reinforced tubes
Inventor:
George W. Burger
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Oct 22, 1988
Inventor
George W. Burger
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.