Granted Patent
Utility
US 4,254,573 · App. 06/033,308
Trolling device
Inventor:
Steven Mastropaolo
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Apr 25, 1979
Inventor
Steven Mastropaolo
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.