Granted Patent
Utility
US 4,433,564 · App. 06/380,141
Scroll manufacturing tool
Inventors:
Eiji Fukushima, Seiichi Fukuhara, Masaharu Hiraga
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: May 20, 1982
Inventors
Eiji Fukushima
Seiichi Fukuhara
Masaharu Hiraga
Assignee (at issue)
SANDEN CORPORATION
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.