|
GB732661A
|
|
Photographic copying camera
|
|
US2473023A
|
|
Halftone screen holder
|
|
US2390065A
|
|
Photographic camera-enlarger
|
|
US2307260A
|
|
Arc lamp
|
|
GB542616A
|
|
Arc lamps
|
|
GB534821A
|
|
Improvements in arc lamps
|
|
US2203410A
|
|
Lamp
|
|
US2171028A
|
|
Stand for supporting light projecting or light receiving units
|
|
US2171027A
|
|
Arc lamp
|
|
US2114664A
|
|
Operating-table illuminator
|
|
US1985922A
|
|
Operating table illuminator
|
|
US1771622A
|
|
Arc lamp
|
|
US1611903A
|
|
Adjustable lamp support
|
|
GB167321A
|
|
Improvements in multiple lamps
|
|
US1347846A
|
|
Multiple lamp
|
