Granted Patent
Utility
US 4,571,112 · App. 06/590,174
Joint assembly
Inventors:
Louis W. Johnson, Bruce G. Johnson
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Mar 16, 1984
Inventors
Louis W. Johnson
Bruce G. Johnson
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.