Granted Patent
Utility
US 5,236,906 · App. 07/635,500
Topical therapeutic preparation
Inventor:
Toshiko Yamamoto
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Jan 3, 1991
Inventor
Toshiko Yamamoto
Assignee (at issue)
Takeda Chemical Industries 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.