Granted Patent
Utility
US 5,312,102 · App. 08/013,528
Variable inertia head racket
Inventor:
Patrick Stennett
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Feb 4, 1993
Inventor
Patrick Stennett
Assignee (at issue)
Lisco Inc.
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.