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Patent applications and USPTO patent grants for Girotti; Enrico.The latest application filed is for "device for generating encrypted images visible only through a polarizing filter and process for making the device".
Patent | Date |
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Device For Generating Encrypted Images Visible Only Through A Polarizing Filter And Process For Making The Device App 20120133850 - Broen; Martin Eduardo ;   et al. | 2012-05-31 |
Multi-layer Film Depicting A Colour Two-dimensional Image Which Is Only Visible Through A Polarizing Filter And Process For Making The Film App 20110304912 - Broen; Martin Eduardo ;   et al. | 2011-12-15 |
Multi-layer Film Depicting A Colour Two-dimensional Image Which Is Only Visible Through A Polarizing Filter And Process For Making The Film App 20110262717 - Broen; Martin Eduardo ;   et al. | 2011-10-27 |
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