Granted Patent
Utility
US 4,830,376 · App. 07/142,047
Puzzles comprised of elements each having a unique arrangement of matchable features
Inventor:
W. Daniel Hillis
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Jan 7, 1988
Inventor
W. Daniel Hillis
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.