Granted Patent
Utility
US 4,079,509 · App. 05/586,855
Method of manufacturing semi-conductor devices
Inventors:
Sydney Jackson, Alan Arthur Shepherd
Patented Case
View Patent ↗
Granted: Mar 21, 1978
Filed: Jun 16, 1975
Inventors
Sydney Jackson
Alan Arthur Shepherd
Assignee (at issue)
Ferranti Limited
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.