I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
This unit was tested and works great. Comes with standard North American 120V power supply. Overview The Alpha 4160C LED Electronic Sign is a state-of-the-art indoor, full matrix, tricolor LED display.
Please contact us for additional information through ebay mail, or directly at: nrscientific@gmail.com 201 592 1864 Beckman Coulter Optima TLX 120,000 RPM UltraCentrifugeCat. No. 361545 Rotors Available Separately.
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