Granted Patent
Utility
US 6,297,640 · App. 09/289,916
Transfer switch position sensing using coil control contacts
Inventor:
John E. Hayes
Patented Case
View Patent ↗
Granted: Oct 2, 2001
Filed: Apr 12, 1999
Inventor
John E. Hayes
Assignee (at issue)
ASCO Power Technologies, L.P.
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.