Granted Patent
Utility
US 6,276,449 · App. 09/533,511
Engine speed control for hoist and tongs
Inventor:
Frederic M. Newman
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Mar 23, 2000
Inventor
Frederic M. Newman
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.