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Inventor

GENGELBACH ROBERT D

US6 patents
⚠️ This page may combine multiple inventors who share the name “GENGELBACH ROBERT D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ILLUMITECH INC

3 patents
US7246921B2Jul 24, 2007

Back-reflecting LED light source

ILLUMITECH INC79 citations96
US7108386B2Sep 19, 2006

High-brightness LED-phosphor coupling

ILLUMITECH INC39 citations91
US7068446B2Jun 27, 2006

Compact non-imaging light collector

ILLUMITECH INC21 citations84

EASTMAN KODAK CO

1 patent
US4310237AJan 12, 1982

Adjusting copy contrast and density

EASTMAN KODAK CO15 citations71

JACOBSON BENJAMIN A

1 patent
US9557033B2Jan 31, 2017

Optical system for batwing distribution

JACOBSON BENJAMIN A4 citations66

PELKA & ASS INC

1 patent
US10877253B2Dec 29, 2020

Optical system

PELKA & ASS INC0 citations35