Granted Patent
Utility
US 4,905,347 · App. 07/237,133
Removable torque rod assembly for self-closing door
Inventor:
Franz L. Wroth
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Aug 26, 1988
Inventor
Franz L. Wroth
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.