Granted Patent
Utility
US 4,573,293 · App. 06/573,117
Building structure
Inventor:
Owen H. Park
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Jan 23, 1984
Inventor
Owen H. Park
Assignee (at issue)
Heartland Industries, Inc.
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.