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"Fooling around with alternating current is just a waste of time. Nobody will use it, ever."
Thomas Edison ; 1889
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| Number | Title | Issue Date |
| 4695146 | Fume exhaust system for photo print processors A fume and heat exhaust system to be used in conjunction with a high-speed photo print processor which requires for its operation that the user be positioned in close proximity to the processor front panel. The processor front panel includes an opening fo... | 09/22/1987 |
| 4083061 | Portable darkroom This invention involves a portable darkroom comprising a box having a light trap on one open side at the front in combination with a non-reflective surface on adjacent wall and floor portions to prevent reflected light from entering the opening of the lig... | 04/04/1978 |
