Granted Patent
Utility
US 4,312,145 · App. 06/127,992
Replaceable fastener for cover plates and the like
Inventor:
Paul J. Lukavich
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Jan 9, 1980
Inventor
Paul J. Lukavich
Assignee (at issue)
Caterpillar Tractor Co.
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.