Granted Patent
Utility
US 5,139,336 · App. 07/573,150
Optical measuring apparatus using amplitude modulation of slipt beams
Inventors:
Chung Wah See, Mehdi Vaez-Iravani
Patented Case
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Granted: Aug 18, 1992
Filed: Sep 14, 1990
Inventors
Chung Wah See
Mehdi Vaez-Iravani
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.