Granted Patent
Utility
US 4,791,774 · App. 07/138,495
Apparatus for interlocking a pair of panels
Inventor:
Rodney K. Calvert
Patented Case
View Patent ↗
Granted: Dec 20, 1988
Filed: Dec 24, 1987
Inventor
Rodney K. Calvert
Assignee (at issue)
The Mead 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.