Granted Patent
Utility
US 4,701,938 · App. 06/794,091
Data system
Inventor:
Clifford J. Bell
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Oct 31, 1985
Inventor
Clifford J. Bell
Assignee (at issue)
Keystone International
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.