Apparatus for displaying dots on a cathode ray tube representing populations of particles being analyzed, which includes a pair of digital memories which concurrently store X-Y data pairs for several particles and which drive the X-Y deflection circuits of an associated CRT....http://www.google.de/patents/US4308587?utm_source=gb-gplus-sharePatent US4308587 - Apparatus for displaying at least two parameters of populations of particles on a cathode ray tube
