Granted Patent
Utility
US 4,902,374 · App. 07/188,884
Bag making machine
Inventors:
David A. Smith, Herbert B. Geiger, R. Douglas Behr
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: May 2, 1988
Inventors
David A. Smith
Herbert B. Geiger
R. Douglas Behr
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.