SEMIFINISHED LENS
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United States of America Patent
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Issued Date -
Feb 8, 2024
app pub date -
Oct 25, 2021
filing date -
Dec 24, 2020
priority date (Note) -
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Abstract
A semifinished lens is configured with at least three marks for specifying the center position of a frame shape. When the semifinished lens is viewed in an optical axis direction, the at least three marks include a pair of marks located on a first straight line passing through the center position and a mark located on a second straight line that is orthogonal to the first straight line and passes through the center position.
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