Granted Patent
Utility
US 6,427,973 · App. 09/632,847
Vacuum system with a vacuum plate valve
Inventor:
Rudolf Wagner
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Aug 4, 2000
Inventor
Rudolf Wagner
Assignee (at issue)
Unaxis Trading Ltd
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.