Granted Patent
Utility
US 6,416,290 · App. 09/355,196
Turbo molecular pump
Inventor:
Akira Yamauchi
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Oct 4, 1999
Inventor
Akira Yamauchi
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.