Granted Patent
Utility
US 4,422,158 · App. 06/210,961
Method and means for interrogating a layered data base
Inventor:
Louis M. Galie
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Nov 28, 1980
Inventor
Louis M. Galie
Assignee (at issue)
SYSTEM DEVELOPMENT 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.