Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
Inventor
active
2,7-Bis-basic ethers of 9-phenanthrol and 9-loweralkoxy phenanth
3,8-Bis-basic ethers of 6H-dibenzo[b,d]pyran-6-one
Derivatives of 6(5H)-phenanthridinone and a method for preparati
Derivatives of 9-phenanthrene
Foraminated optical contact lens
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Profile ID: LFUS-PAI-P-595267