Granted Patent
Utility
US 4,326,701 · App. 06/231,297
Lance apparatus
Inventors:
Ralph P. Hayden, Jr., Joe M. Barksdale
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Feb 4, 1981
Inventors
Ralph P. Hayden, Jr.
Joe M. Barksdale
Assignee (at issue)
Kaiser Steel 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.