Granted Patent
Utility
US 6,334,754 · App. 09/338,310
Turbomolecular pump
Inventor:
Takashi Kabasawa
Patented Case
View Patent ↗
Granted: Jan 1, 2002
Filed: Jun 22, 1999
Inventor
Takashi Kabasawa
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.