Granted Patent
Utility
US 6,599,094 · App. 09/789,755
Screw compressor system and operating method thereof
Inventors:
Kazuya Kanazaki, Shinichi Hirose, Junji Okita, Seiji Tsuru
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Feb 22, 2001
Inventors
Kazuya Kanazaki
Shinichi Hirose
Junji Okita
Seiji Tsuru
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.