Granted Patent
Utility
US 4,762,430 · App. 07/071,296
Ribbed draw tape for thermoplastic bag
Inventor:
Edward M. Bullard
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Jul 9, 1987
Inventor
Edward M. Bullard
Assignee (at issue)
Mobil Oil Corporation
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.