United States Patent List4,541,719 Method and apparatus for characterizing microparticles and measuring their response to their environment4,548,500 Process and apparatus for identifying or characterizing small particles4,616,927 Sample cell for light scattering measurements4,693,602 Method and apparatus for measuring the light scattering properties of small particles4,710,025 Process for characterizing suspensions of small particles4,907,884 Sample cell monitoring system5,404,217 Laser liquid flow cell manifold system and method for assembly5,475,235 Control of laser light power output for use in light scattering instruments by inducing mode hopping and averaging results5,528,366 Precision determination for molecular weights5,530,540 Light scattering measurement cell for very small volumes5,676,830 Method and apparatus for reducing band broadening in chromatographic detectors5,900,152 Apparatus to reduce inhomogeneities in opitcal flow cells6,128,080 Extended range interferometric refractometer6,452,672 Self cleaning optical flow cell6,426,794 Optical flow cell incorporating automatic self-cleaning6,411,383 Method for measuring the 2nd virial coefficient6,651,009 Method for determining average solution properties of macromolecules by the injection methodpending Method for determining absolute number densities of particles in suspensionpending Method for correcting the effects of interdetector band broadeningpending Refractometer cell for both absolute and differential refractive index measurements of fluidspending Enhanced sensitivity differential refractometer measurement cell

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