Inventor

BRETTEL HANS

FR2 patents

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

STRAHLEN UMWELTFORSCH GMBH

1 patent

US4452083AJun 5, 1984

Ultrasonic diagnosis device

STRAHLEN UMWELTFORSCH GMBH4 citations57

ESSILOR INT

1 patent

US6864981B2Mar 8, 2005

Method of obtaining a range of colors

ESSILOR INT0 citations38