Patents by Inventor David C. TANG

David C. TANG 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).

  • Ophthalmic lens centring-blocking apparatus
    Patent number: 10306119
    Abstract: Disclosed is a centering-blocking apparatus (1) including: a frame (10); an ophthalmic lens holder (20); a blocking unit (30) suitable for receiving a blocking accessory (200) with a view to depositing it on the ophthalmic lens; and a centering unit (40) suitable for revealing a reference system of the ophthalmic lens. According to an embodiment, the blocking unit is fixedly mounted on the frame whereas the holder is movably mounted on the frame.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: May 28, 2019
    Assignee: ESSILOR INTERNATIONAL
    Inventors: David C Tang, Guilhem Escalier, Stephane Boutinon, Michel Nauche, Leonard Hartmann
  • OPHTHALMIC LENS CENTRING-BLOCKING APPARATUS
    Publication number: 20170163857
    Abstract: Disclosed is a centering-blocking apparatus (1) including: a frame (10); an ophthalmic lens holder (20); a blocking unit (30) suitable for receiving a blocking accessory (200) with a view to depositing it on the ophthalmic lens; and a centering unit (40) suitable for revealing a reference system of the ophthalmic lens. According to an embodiment, the blocking unit is fixedly mounted on the frame whereas the holder is movably mounted on the frame.
    Type: Application
    Filed: June 23, 2015
    Publication date: June 8, 2017
    Inventors: David C. TANG, Guilhem ESCALIER, Stephane BOUTINON, Michel NAUCHE, Léonard HARTMANN