72132867
Nov 27, 1961
Oct 1, 1963
O. C. RUDOLPH & SONS INC.
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OPTICAL RESEARCH AND CONTROL INSTRUMENTS-NAMELY, POLARIMETERS, SACCHARIMETERS, SPECTROPOLARIMETERS, SPECTROMETERS, MONOCHROMATORS, ELLIPSOMETERS, LIGHT SOURCES, ADAPTOMETERS, AND POLARIZATION PHOTOMETERS