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Six-year-old Robert W. Patch granted a patent for a "toy truck".
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| Number | Title | Issue Date |
| 6296478 | Method and apparatus for cooling a furnace motor A furnace includes a motor in a motor housing that drives a fan that draws heated air through a heat exchanger of the furnace and also draws a flow of air through the motor housing to cool the motor as well as the motor housing.... | 10/02/2001 |
| 5211557 | Heating furnace A heating furnace for e.g. a hot rolling process of any object is disclosed. The furnace has a heat-resistant conveyer device for conveying a treatment object in a high-temperature atmosphere inside the furnace. The conveyer device includes an elongate co... | 05/18/1993 |
| 4392821 | Calcining furnace with gas-permeable wall structure A calcining kiln for burning limestone or similar mineral raw material is formed with a wall structure which is gas-permeable at least in a region adjacent the openings of burners extending to the interior of the kiln with a compressed gaseous medium bein... | 07/12/1983 |
| 4288295 | Coke oven with apparatus for partially drying and preheating coal A coking oven having a coking chamber and a combustion chamber with a high temperature flue gas outlet connected to a first heat exchanger for heating cool air to cool the flue gases to an intermediate temperature, a coal dryer using the intermediate temp... | 09/08/1981 |
| 4015932 | Combustion air preheater Exhaust heat from a slot furnance is recouped by a preheater unit consisting of a pipe mounted within a flue into which exhaust gasses pass through a slot, the flue being formed by a three-sided structure mounted on the outside wall of the furnance above ... | 04/05/1977 |
| 4012271 | Water-cooled support bar There is disclosed a water cooled support bar comprised of a pipe within a pipe which assures the axial position of a cylinder-like sleeve of heat shrinkable foam thermoplastic material on a glass container during transport from an assembly station on a t... | 03/15/1977 |
