Granted Patent
Utility
US 4,445,641 · App. 06/338,166
Controlled-release dispenser
Inventors:
Richard W. Baker, Yasuo Ninomiya
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Jan 8, 1982
Inventors
Richard W. Baker
Yasuo Ninomiya
Assignee (at issue)
Bend Reserch, Inc.
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.