Granted Patent
Utility
US 5,314,002 · App. 08/049,766
Vacuum valve apparatus for die casting
Inventors:
Russell J. VanRens, Donald L. Lessard
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Apr 19, 1993
Inventors
Russell J. VanRens
Donald L. Lessard
Assignee (at issue)
Outboard Marine 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.