Granted Patent
Utility
US 4,514,047 · App. 06/433,933
On-axis achromatic quarterwave retarder prism
Inventors:
Haim M. Haskal, Robert A. Briones
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Oct 12, 1982
Inventors
Haim M. Haskal
Robert A. Briones
Assignee (at issue)
Magnetic Peripherals, 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.