Granted Patent
Utility
US 5,944,500 · App. 08/877,896
Scroll-type fluid displacement apparatus having a strengthened inner terminal end portion of the spiral element
Inventor:
Jiro Iizuka
Patented Case
View Patent ↗
Granted: Aug 31, 1999
Filed: Jun 18, 1997
Inventor
Jiro Iizuka
Assignee (at issue)
SANDEN CORPORATION
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.