| http://www.w3.org/ns/prov#value | - The inventive method applies to a machine including a piercing tool, a lens support which is associated...http://www.google.com/patents/US7668617?utm_source=gb-gplus-sharePatent US7668617 - Method of calibrating an ophthalmic-lens-piercing machine, device used to implement one such method and ophthalmic-lens-machining apparatus comprising one such deviceAdvanced Patent SearchPublication numberUS76
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