Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 6923851 | Blue smoke control collector system The blue smoke control collector system is used for the collection of the blue haze which is actually comprised of tiny oil droplets that hover over hot asphaltic concrete mix. The system is designed to collect and filter the air generated at hot mix asphalt transfe... | 08/02/2005 |
| 6592656 | Water apparatus for treating industrial waste products There is provided apparatus for treating water containing industrial waste products. A first tank contains water at a determined pressure. A second tank is placed inside the first tank and communicated with a lower portion thereof. It contains water at a ... | 07/15/2003 |
| 6565636 | Exhaust cleaning device An exhaust cleaning device for removing a portion of carbon containing molecules from exhaust. The exhaust cleaning device includes a tubular member which is elongate and has a first end and a second end. The first and second ends are placed in communicat... | 05/20/2003 |
| 4968336 | Plasma etch vaporous exhaust collection system A system for treating and removing toxic by-products of semiconductor plasma etching processes utilizes a collection box having various treatment chambers in seriatim. A heated inlet conducts a vaporous process stream into an expansion chamber where the g... | 11/06/1990 |
| 4923489 | Liquid level controller A liquid level controller for a waterpan-type spray booth. The controller comprises a normally-open first air pressure sensor and switch for detecting a minimum level of negative static pressure through the restricted opening indicative of ventilation fan... | 05/08/1990 |
| 4278451 | Apparatus for extracting granular or finely divided solid materials from a gas under pressure A method of and apparatus for extracting granular or finely divided or powdered solid materials from a gas under high pressure, particularly slag from synthesized gas generated in connection with the gasification of coal. The invention is carried out by u... | 07/14/1981 |
