Granted Patent
Utility
US 5,909,867 · App. 09/085,431
Closing assembly for a chamber having a through-opening
Inventor:
Thomas Blecha
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: May 27, 1998
Inventor
Thomas Blecha
Assignee (at issue)
VAT Holding AG
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.