Granted Patent
Utility
US 5,253,252 · App. 07/668,363
Token device for distributed time scheduling in a data processing system
Inventor:
Nathan H. Tobol
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Mar 12, 1991
Inventor
Nathan H. Tobol
Assignee (at issue)
Fox Boro Company
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.