Granted Patent
Utility
US 5,184,634 · App. 07/746,247
Cup cleaning apparatus
Inventor:
Masaichi Kitajima
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Aug 15, 1991
Inventor
Masaichi Kitajima
Assignee (at issue)
Olympus Optical 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.