Granted Patent
Utility
US 6,708,520 · App. 10/237,728
Scroll compressor and refrigerating system using ammonia group refrigerant
Inventors:
Shunsuke Yasunori, Kenji Tojo, Mutsunori Matsunaga
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Sep 10, 2002
Inventors
Shunsuke Yasunori
Kenji Tojo
Mutsunori Matsunaga
Assignee (at issue)
Hitachi, Ltd., trustee, for the benefit of Hitachi Air Conditioning Systems Co., 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.