Granted Patent
Utility
US 6,518,547 · App. 09/788,086
Heat treatment apparatus
Inventors:
Mitsukazu Takahashi, Hideo Nishihara, Yoshio Ito
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Feb 16, 2001
Inventors
Mitsukazu Takahashi
Hideo Nishihara
Yoshio Ito
Assignee (at issue)
DAINIPPON SCREEN MFG. 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.