Granted Patent
Utility
US 5,074,547 · App. 07/463,681
Multiple delivery system
Inventors:
David A. Smith, Clark M. Woody
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Jan 11, 1990
Inventors
David A. Smith
Clark M. Woody
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.