Granted Patent
Utility
US 6,544,034 · App. 09/938,318
Heat treatment equipment for object to be treated and its exhausting method
Inventor:
Minoru Watanabe
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Aug 24, 2001
Inventor
Minoru Watanabe
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., 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.