Granted Patent
Utility
US 4,586,716 · App. 06/601,352
Double bullseye for dart game
Inventors:
Robert J. Brejcha, Leonard J. Kubacki
Patented Case
View Patent ↗
Granted: May 6, 1986
Filed: Apr 17, 1984
Inventors
Robert J. Brejcha
Leonard J. Kubacki
Assignee (at issue)
Industrial Design Electronic Assoc., 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.