Granted Patent
Utility
US 6,201,330 · App. 09/484,752
Adjustable tuning spring system for vibratory conveyor drives
Inventor:
Harold E. Patterson
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Jan 18, 2000
Inventor
Harold E. Patterson
Assignee (at issue)
FMC 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.