I principali brevetti del rifrattometro:
1. Rifrattometro di Abbe (21 febbraio 1978): A follower mechanism is used to determine the precise location of a moveable mirror in an Abbe Refractometer to provide the necessary information for converting mirror position to index of refraction. The mechanism is particularly suitable for conversion and readout by electronic means.
link pdf brevetto: https://patents.google.com/patent/US4188116?oq=refractometer+abbe
US4188116A
2. Rifrattometro automatico (6 dicembre 1984): An automatic refractometer comprising a photosensitive device having a relatively narrow dynamic range in the form of a linear scanned array including a plurality of photoelectric elements each providing an output pulse during a scan and the amplitude of each pulse being determined by the amount of illumination of the corresponding element by incident light, an optical system for directing light onto the array in a manner such that the particular photoelectric elements of the array which are illuminated by the light are determined by the index of refraction of a light transmitting substance placed in operative association with the optical system
link pdf brevetto: https://patents.google.com/patent/US4640616?oq=refractometer+digital
US4640616A
3. Rifrattometro universale (31 marzo 2010): A portable liquid design system includes a portable information handling system (IHS) that employs a liquid design application capable of operating in different modes to design different liquids such as corn syrup, espresso, coffee, soda pop and others
link pdf brevetto: https://patents.google.com/patent/US8239144?oq=refractometer+digital
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