Philippe Hubbard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: Dial (2) designed to equip a watch piece provided with luminous marks (32) lodged under a mother-of-pearl semi-transparent layer (20) inside blind hollows (35) made in the semi-transparent layer (20) and filled with a phosphorescent pigment (32). The luminous marks (32) form an image (61) visible in darkness and essentially invisible in daylight.
Abstract: Dial (2) designed to equip a watch piece provided with luminous marks (32) lodged under a mother-of-pearl semi-transparent layer (20) inside blind hollows (35) made in the semi-transparent layer (20) and filled with a phosphorescent pigment (32). The luminous marks (32) form an image (61) visible in darkness and essentially invisible in daylight.