Granted Patent
Utility
US 4,720,123 · App. 06/913,062
Customized calendar
Inventor:
Robert G. Chelius
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Sep 29, 1986
Inventor
Robert G. Chelius
Assignee (at issue)
Colorforms Image Center, 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.