Granted Patent
Utility
US 5,367,549 · App. 08/057,788
Hexagonal grid
Inventor:
Stephen C. Hatfield
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: May 6, 1993
Inventor
Stephen C. Hatfield
Assignee (at issue)
Combustion Engineering, 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.