Granted Patent
Utility
US 4,470,726 · App. 06/432,601
Leg closure
Inventor:
Lonnie Carl Helms
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Oct 4, 1982
Inventor
Lonnie Carl Helms
Assignee (at issue)
Halliburton
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.