Granted Patent
Utility
US 4,389,916 · App. 06/232,045
Violin support
Inventor:
Olof J. J. Ruthstrom
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Jan 14, 1981
Inventor
Olof J. J. Ruthstrom
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.