Granted Patent
Utility
US 4,416,455 · App. 06/306,989
Interlocking word game utilizing prismatic blocks and method of playing same
Inventors:
Leo J. Munson, Felix Griauzde, David T. Okada, Bernard Loomis
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Sep 30, 1981
Inventors
Leo J. Munson
Felix Griauzde
David T. Okada
Bernard Loomis
Assignee (at issue)
CPG Products Corp.
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.