Granted Patent
Utility
US 6,231,317 · App. 09/389,226
Sealed compressor driven by a motor
Inventors:
Kazutaka Watanabe, Yoshihiro Sasaki, Koichi Sekiguchi
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Sep 3, 1999
Inventors
Kazutaka Watanabe
Yoshihiro Sasaki
Koichi Sekiguchi
Assignee (at issue)
HITACHI, LTD.
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.