1
Walter P Siegmund, Anthony F Szwarc: Orientation indicator for a flexible fiberscope or endoscope including method of manufacture. Schott Fiber Optics, Bachman & LaPointe, February 20, 1990: US04902129 (64 worldwide citation)

An orientation indicator is disclosed for observing or reading the orientation of the distal end of an endoscope or of a fiberscope having an elongated flexible shaft relative to the proximate end thereof where the flexible shaft the fiber optic bundles of the scope are subject to torque or rotation ...


2
Howard E Chace, Anthony F Szwarc: Lens power display in prescription form. American Optical Corporation, Jeremiah J Duggan, Stephen A Schneeberger, October 31, 1978: US04123163 (7 worldwide citation)

Apparatus for measuring the refractive powers of a lens and displaying the measured powers in so-called prescription form. A focimeter is equipped with means for generating electrical signals indicative of the net refractive powers of the lens, which signals are extended to novel electronic logic an ...