Granted Patent
Utility
US 5,883,510 · App. 08/854,975
Tachometer system picking up ignition signals from vehicle ground
Inventors:
Joseph Torre, Steven Nichols
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: May 13, 1997
Inventors
Joseph Torre
Steven Nichols
Assignee (at issue)
SPX 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.