Inventor

LEONG HELEN

US3 patents

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

ADVANCED POLYMER SYSTEMS INC

2 patents

US4855144AAug 8, 1989

Synthetic melanin aggregates

ADVANCED POLYMER SYSTEMS INC87 citations92

US4806360AFeb 21, 1989

Synthetic melanin aggregates

ADVANCED POLYMER SYSTEMS INC64 citations92

BERLINER DAVID L

1 patent

US5286979AFeb 15, 1994

Process for absorbing ultraviolet radiation using dispersed melanin

BERLINER DAVID L10 citations70