P

Inventor

MACHIDA KATSUICHI

JP6 patents
⚠️ This page may combine multiple inventors who share the name “MACHIDA KATSUICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KUREHA CHEMICAL IND CO LTD

4 patents
US4756973AJul 12, 1988

Photochromic lens

KUREHA CHEMICAL IND CO LTD251 citations98
US5017698AMay 21, 1991

Spirooxazine photochromic compounds

KUREHA CHEMICAL IND CO LTD32 citations92
US6562992B2May 13, 2003

Optical material

KUREHA CHEMICAL IND CO LTD3 citations61
US7053231B2May 30, 2006

Building material

KUREHA CHEMICAL IND CO LTD0 citations51

KUREHA CORP

2 patents
US7025908B1Apr 11, 2006

Optical filter and process for producing the same

KUREHA CORP73 citations95
US7067074B2Jun 27, 2006

Near-infrared-absorbing composition and optical material

KUREHA CORP4 citations59