Granted Patent
Utility
US 6,349,108 · App. 09/802,330
High temperature vacuum furnace
Inventor:
Lennie L. Ashburn
Patented Case
View Patent ↗
Granted: Feb 19, 2002
Filed: Mar 8, 2001
Inventor
Lennie L. Ashburn
Assignee (at issue)
PV/T, 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.