Granted Patent
Utility
US 5,220,406 · App. 07/766,683
Sample point interferometer having separate rigid body and figure measurement channels
Inventor:
Stanley J. Kishner
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Sep 27, 1991
Inventor
Stanley J. Kishner
Assignee (at issue)
Hughes Danbury Optical Systems, 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.