Granted Patent
Utility
US 6,672,827 · App. 10/016,590
Vacuum pump
Inventors:
Yoshihiro Yamashita, Manabu Nonaka, Takashi Kabasawa
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Oct 30, 2001
Inventors
Yoshihiro Yamashita
Manabu Nonaka
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.