Granted Patent
Utility
US 5,284,436 · App. 08/053,496
Injection molding torpedo with shaft having ceramic central portion
Inventor:
Jobst U. Gellert
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Apr 29, 1993
Inventor
Jobst U. Gellert
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.