|
US2638039A
|
|
Automatic photographic unit having synchronized shutter and light source
|
|
US2601086A
|
|
Close-up stereo camera
|
|
US2556866A
|
|
Exposure indicator and field determinator for x-ray apparatus
|
|
US2422077A
|
|
Camera shutter system
|
|
US2275610A
|
|
Loudspeaker system
|
|
US2292044A
|
|
Illumination for cameras
|
|
US2239379A
|
|
Self-focusing and illuminating device for photographic cameras
|
|
US2058562A
|
|
Light intensity self-adjusting camera
|
|
US2031097A
|
|
Stand for x-ray apparatus and the like
|
|
US1991192A
|
|
Oil tank level indicator
|
|
US1949600A
|
|
Luminous indicator for measuring instruments
|
|
US1726212A
|
|
Irrigator for the intestines, bladder, pelvis, and the like
|
|
US1708494A
|
|
X-ray tube
|
|
US1658833A
|
|
Adjustable carrier for photographic plate holders
|
|
US1679894A
|
|
X-ray tube
|
|
US1679332A
|
|
X-ray tube
|
|
US1567833A
|
|
Grid-shaped screen for x-ray apparatus
|
|
GB158514A
|
|
Improvements in plate-holders for taking rontgen photographs
|
|
US1449970A
|
|
Plate holder for taking rontgen photographs
|
