Granted Patent
Utility
US 5,137,442 · App. 07/652,094
Universal internal core lifter apparatus
Inventor:
Glenn Starkey
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Feb 7, 1991
Inventor
Glenn Starkey
Assignee (at issue)
D&L COMPANY, LLC
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.