Inventor

GRONDAL DANIEL J

US3 patents

Patents

3 patents

US5428912AJul 4, 1995

Indirectly illuminated sign

PROLUME INC112 citations96

US6026602AFeb 22, 2000

Apparatus and method of indirectly illuminating a sign

PROLUME INC68 citations93

US5542201AAug 6, 1996

Indirectly illuminated sign

PROLUME INC38 citations93