Granted Patent
Utility
US 6,755,039 · App. 10/653,975
Screw refrigerating apparatus
Inventor:
Noboru Tsuboi
Patented Case
View Patent ↗
Granted: Jun 29, 2004
Filed: Sep 4, 2003
Inventor
Noboru Tsuboi
Assignee (at issue)
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, 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.