TWO POSITIVE

Brand	Owner	Address	Description
2ITIVE	MERCK SHARP & DOHME CORP.	Office of General Counsel One Merck Drive Whitehouse Station NJ 08889	TWO POSITIVE; TO POSITIVE;Injection device for pharmaceuticals;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

The invention relates to an image-formation optical system capable of achieving wide-angle arrangement and compactness at the same time and an imaging system that incorporates the same. The image-formation optical system is made up of, in order from its object side, a first positive lens L1, a second negative lens L2, a third positive lens L3 and a fourth positive lens L4. The composite focal length of the first positive lens L1 and the second negative lens L2 is positive, or the composite focal length of the second negative lens L2, the third positive lens L3 and the fourth positive lens L4 is negative.