Granted Patent
Utility
US 4,971,846 · App. 07/397,362
Thermoplastic cylinder and process for manufacturing same
Inventor:
Brian Lundy
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Aug 21, 1989
Inventor
Brian Lundy
Assignee (at issue)
TRE Corporation
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.