U. S.  Patent  # 7,162,115, ”Multiport wavelength-selective optical switch”.

U. S. Patent # 6,532,318, ”Symmetric wavelength selective switch for interconnecting two WDM rings”.

U. S.  Patent # 6,389,189, ”Fluid-encapsulated MEMS optical switch”.

U. S. Patent # 6,275,623, ”Dynamically configurable spectral filter”.

U. S. Patent # 5,204,734, "Rough surface profiler and method".

U. S. Patent # 5,173,746, "Method for rapid, accurate measurement of step heights between dissimilar materials".

U. S. Patent # 5,133,601, "Rough surface profiler and method".

U. S. Patent # 5,129,724, "Apparatus and method for simultaneous measurement of film thickness and surface height variation for film-substrate sample".

U. S. Patent # 4,982,206, "Laser printer having apodising mask".

U. S. Patent # 4,973,121, "Scanner". (Co-inventor)

U. S. Patent # 4,961,079, "Laser printer having athermalized heads".

       U. S. Patent # 4,933,688, "Laser printer having uniform circumferential laser placement".

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