Granted Patent
Utility
US 4,320,571 · App. 06/196,684
Stencil mask process for high power, high speed controlled rectifiers
Inventor:
James H. Hauck
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Oct 14, 1980
Inventor
James H. Hauck
Assignee (at issue)
International Rectifier Corporation
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.