Granted Patent
Utility
US 6,599,108 · App. 09/997,482
Vacuum pump
Inventor:
Yoshihiro Yamashita
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Nov 21, 2001
Inventor
Yoshihiro Yamashita
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.