Scientific, navigational, surveying, photographic, film, optical, weighing, measuring, signal, control, rescue, and instructional apparatus and instruments; apparatus and instruments for conducting, switching, converting, storing, regulating, and controlling electricity; devices for recording, transmitting, and playing back sound and image; computing machines, data processing devices, and computers; devices, assemblies, and components for transmitting electrical and optical signals or energy ...

Devices, assemblies, and/or components for transmitting electrical and optical signals and/or energy as well as for data transmission between units which are movable in relation to one another comprised of electrical couplings, electric current collectors, rotary couplings, rotary joints, and rotary joint brushes, all sold together as one unit