Inventor

ORMANNS SIEGFRIED

DE3 patents

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

RUHRKOHLE AG

2 patents

US4495495AJan 22, 1985

Staff-location and signalling system for use in mines

RUHRKOHLE AG113 citations93

US5107180AApr 21, 1992

System for operating a portable lamp

RUHRKOHLE AG11 citations64

SELECTRONIC FUNK & SICHERHEITS

1 patent

US4870700ASep 26, 1989

Personal safety radio device

SELECTRONIC FUNK & SICHERHEITS71 citations86