Inventor
SHINGAKI SEIICHI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “SHINGAKI SEIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOYA CORP
5 patentsUS4844589AJul 4, 1989
Lenses having plural contiguous refractive index distribution substrates and method of manufacture
HOYA CORP16 citations73
US4640699AFeb 3, 1987
Process for producing glass product having gradient of refractive index
HOYA CORP6 citations72
US4525189AJun 25, 1985
Process for producing glass product having gradient of refractive index
HOYA CORP14 citations72
US4767435AAug 30, 1988
Process for producing transparent glass product having refractive index gradient
HOYA CORP6 citations62
US4563205AJan 7, 1986
Process for the production of slab-shaped lens having gradient of refractive index in thickness direction only
HOYA CORP4 citations61