Granted Patent
Utility
US 4,843,852 · App. 07/203,947
Disposable construction core
Inventors:
William R. Foshee, Duane B. Nixon, Ralph P. Palmer
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Jun 8, 1988
Inventors
William R. Foshee
Duane B. Nixon
Ralph P. Palmer
Assignee (at issue)
Best Lock 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.