"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 4309365 | Non-corrosive, non-staining evaporative cooler An evaporative cooler body comprises a non-corrosive, insulative assembly of self-locating, self-jigging parts. Stand-off means are provided for increasing the effective area of the evaporative cooling pads and for improving air flow across the surface of... | 01/05/1982 |
| 4234526 | Evaporative cooler An evaporative cooler having a one-piece, frameless shell secured to a bottom pan and having a top cover hinged along one edge to the side wall of the housing shell. A quick-release latching mechanism secures the top cover to the opposite side wall to hol... | 11/18/1980 |