Granted Patent
Utility
US 4,353,087 · App. 06/019,964
Automatic mask alignment
Inventors:
Daniel G. Berry, David A. Markle
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Mar 12, 1979
Inventors
Daniel G. Berry
David A. Markle
Assignee (at issue)
PerkinElmer, 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.