Granted Patent
Utility
US 4,836,556 · App. 07/131,950
Dart game target construction
Inventors:
Donald P. DeVale, Robert J. Brejcha, Gregory William Lantz
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Dec 11, 1987
Inventors
Donald P. DeVale
Robert J. Brejcha
Gregory William Lantz
Assignee (at issue)
Kidde Recreation Products, 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.