Granted Patent
Utility
US 6,671,583 · App. 09/822,106
Vacuum system information network
Inventors:
John J. Varone, Norbert Elsdoerfer
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Mar 30, 2001
Inventors
John J. Varone
Norbert Elsdoerfer
Assignee (at issue)
Helix Technology Inc.
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.