Granted Patent
Utility
US 5,334,010 · App. 08/183,313
Valve gated injection molding apparatus with a spring in the piston
Inventor:
Alex Teng
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Jan 19, 1994
Inventor
Alex Teng
Assignee (at issue)
Mold-Masters Limited
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.