Granted Patent
Utility
US 6,814,536 · App. 10/294,827
Vacuum pump
Inventors:
Yoshiyuki Sakaguchi, Yasushi Maejima
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Nov 14, 2002
Inventors
Yoshiyuki Sakaguchi
Yasushi Maejima
Assignee (at issue)
BOC Edwards Technologies Limited
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.