Granted Patent
Utility
US 4,585,931 · App. 06/553,655
Method for automatically identifying semiconductor wafers
Inventors:
Hibbert Alexander Duncan, Francis J. Ehret, Sherwin R. Kahn, Karen H. Kinney, Peter D. Parry
Patented Case
View Patent ↗
Granted: Apr 29, 1986
Filed: Nov 21, 1983
Inventors
Hibbert Alexander Duncan
Francis J. Ehret
Sherwin R. Kahn
Karen H. Kinney
Peter D. Parry
Assignee (at issue)
AT&T Technologies Incorporated
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.