Granted Patent
Utility
US 5,607,993 · App. 08/202,517
Low-density bouncing putty
Inventor:
Michael Christy
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Feb 28, 1994
Inventor
Michael Christy
Assignee (at issue)
North Coast Medical, 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.