Granted Patent
Utility
US 5,915,537 · App. 08/780,822
Helmet
Inventors:
Elizabeth Dallas, Roger M. Ball
Patented Case
View Patent ↗
Granted: Jun 29, 1999
Filed: Jan 9, 1997
Inventors
Elizabeth Dallas
Roger M. Ball
Assignee (at issue)
Red Corporation
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.