Granted Patent
Utility
US 5,183,265 · App. 07/659,307
Racquets, in particular tennis racquets
Inventors:
Helmut Umlauft, Karl-Heinz Wager
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: May 16, 1991
Inventors
Helmut Umlauft
Karl-Heinz Wager
Assignee (at issue)
Head Sportgerate Gesellschaft m.b.H. & Co. OHG
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.