Granted Patent
Utility
US 4,764,643 · App. 07/001,227
Route to hybrid rice production
Inventor:
Alfonso G. Calub
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jan 6, 1987
Inventor
Alfonso G. Calub
Assignee (at issue)
Ring Around Products, 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.