195675 ⎘
Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of rotating members, e.g. in the form of perforations, prints, or transparencies on a drum or disc Electric control therefor
Motor improvement for self-rotating displays
#2Pressure equalization structure and motor improvement for fluid-immersed self-rotating displays
#33-D image night light gun
#4Methods, apparatuses, and control systems for adaptive wind-driven outdoor all-surrounding information display