Granted Patent
Utility
US 5,575,017 · App. 08/587,602
Adjustable baseball batter's helmet
Inventors:
Dennis V. Hefling, Matthew Winningham, Randy D. Black, Sally Yeast
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Jan 2, 1996
Inventors
Dennis V. Hefling
Matthew Winningham
Randy D. Black
Sally Yeast
Assignee (at issue)
RAWLINGS SPORTING GOODS COMPANY, 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.