Granted Patent
Utility
US 4,872,303 · App. 07/159,276
Bag top forming method and apparatus
Inventor:
Harold K. Johnson
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Feb 25, 1988
Inventor
Harold K. Johnson
Assignee (at issue)
Mid America Machine Corp.
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.