Granted Patent
Utility
US 5,506,012 · App. 08/221,482
Multiple chambered lift bag
Inventors:
Hancel R. Wright, Harry T. Metcalfe
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Apr 1, 1994
Inventors
Hancel R. Wright
Harry T. Metcalfe
Assignee (at issue)
Engineered Fabrics 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.