Inventor
GRAHMANN HELMUT
DE3 patents
Patents
3 patentsUS4178050ADec 11, 1979
Manufacture of halogen cycle incandescent lamps
PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH8 citations71
US4469983ASep 4, 1984
Electric lamp with an envelope seal designed as pinch seal, and a device and method for its manufacture
PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH13 citations69
US4672263AJun 9, 1987
Single-ended fluorescent discharge lamp construction
PATENT TREUHAND GES FUER ELEKTRISCHE GLUEHLAMPEN MBH6 citations58