Honeycomb pattern ceiling elements - consist of sheet metal strips bent into linked star pieces with rails clamped in position
DE2645800A1
Coloured image representation system - consists of illuminated single points and uses adjustable mask with number of positions corresponding to number of images
DE2456483A1
Fluorescent lamp electrode with bulb - has sealed metal disc closure with corrugations with electrode on inner surface
DE2442091A1
Constant current supply for gas discharge lamps - uses relaxation oscillator and is independent of number or length of discharge tubes in circuit
DE2438608A1
RELIEF LETTER
DE2438609A1
RELIEF ADVERTISING LETTERING
DE2418197A1
Light fitting for grid-type ceiling - forms ceiling support element and has suspension members permitting releasable connection to ceiling
DE1772515A1
Light tube letter
DE1764031A1
Insertion light
DE1648231A1
Radiation measuring cell
DE1539441A1
High-voltage transformer for switching on and operating electrical high-voltage discharge tubes, in particular fluorescent tubes
DE1262409B
Programmer
DE1241890B
Electrical switch for sliding contact
DE1589192A1
Light tube ballast with safety device
DE1119329B
Electronic pulse generator
DE1090949B
Light tube sign with a base made of plastic material
