Granted Patent
Utility
US 6,368,087 · App. 09/777,868
Scroll-type fluid displacement apparatus having spiral start portion with thick base and thin tip
Inventors:
Toshiyuki Kikuchi, Ko Tsukamoto
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Feb 7, 2001
Inventors
Toshiyuki Kikuchi
Ko Tsukamoto
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.