Granted Patent
Utility
US 4,310,157 · App. 06/126,737
Tennis racket
Inventor:
Louis E. Greenberg
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Mar 3, 1980
Inventor
Louis E. Greenberg
Assignee (at issue)
AMF GmbH
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.