Granted Patent
Utility
US 5,989,721 · App. 08/648,412
Device and method for generating electrical energy
Inventor:
Walter C. Lovell
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 15, 1996
Inventor
Walter C. Lovell
Assignee (at issue)
Tapeswitch Corporation of America
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.