Granted Patent
Utility
US 4,981,808 · App. 07/298,881
Process for the manufacture of III-V semiconductor devices
Inventor:
Roger Hayes
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: Jan 12, 1989
Inventor
Roger Hayes
Assignee (at issue)
Plessey Overseas 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.