US2618106A - Booster for lens edge grinding machines ...


US2618106A US188710A US18871050A US2618106A US 2618106 A US2618106 A US 2618106A US 188710 A US188710 A US 188710A US 18871050 A US18871050 A US 18871050A US 2618106 A US2618106 A US 2618106A Authority US United States Prior art keywords lens shaft gear sizer motor Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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