Granted Patent
Utility
US 6,575,713 · App. 09/740,663
Vaccum pump
Inventors:
Yoshinobu Ohtachi, Hirotaka Namiki, Akira Yamauchi
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Dec 19, 2000
Inventors
Yoshinobu Ohtachi
Hirotaka Namiki
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.