Granted Patent
Utility
US 6,145,837 · App. 09/143,499
Three-dimensional geometric puzzle
Inventor:
Linda Silvey
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: Aug 28, 1998
Inventor
Linda Silvey
Assignee (at issue)
A. Daigger and 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.