Granted Patent
Utility
US 3,942,673 · App. 05/468,817
Wall construction for containers
Inventors:
Seung W. Lyu, Donald E. Martin
Patented Case
View Patent ↗
Granted: Mar 9, 1976
Filed: May 10, 1974
Inventors
Seung W. Lyu
Donald E. Martin
Assignee (at issue)
National Crane 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.