Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4743739 | Oscillating louver electric fan heater A fan heating includes a stationary housing and a louvre blade assembly having at least one oscillating louvre blade located forwardly in the housing for providing multidirectional hot air flow from the heater. The heater further includes a drive system f... | 05/10/1988 |
| 4740670 | Electric fan heater for circulating and/or heating air A multiuse fan includes a housing enclosing an electrically driven fan for providing a flow to air from a grilled air inlet to a grilled air outlet through a generally circular electric heater assembly in the housing. The heater assembly includes a gratin... | 04/26/1988 |
| 4737616 | Multi-function portable electric room heater having a removable heating cartridge A multifunction portable electric room heater has an outer housing provided with an air inlet and air outlet and encloses a removable unit including a hollow base containing electrical power supply circuitry and supporting on its upper side a heating cart... | 04/12/1988 |
| 4642441 | Portable fan for winter and summer use A multi-purpose fan including an electrically driven fan blade assembly, a heating coil positioned in the front of the blade assembly and rotatable air directing means which in use causes a gyratory exeunt air current. The fan also includes a micro-proces... | 02/10/1987 |
| 4593179 | Multi function air heater A multi-functional air heater and compressor is provided and consists of a cylindrical housing having a closed bottom and an open top, an electric fan affixed vertically in the bottom of the housing, first screen affixed around circumference of the housin... | 06/03/1986 |
| 4549072 | Proofing or heating cabinet A proofing or heating cabinet is provided having an enclosure with an interior and a pair of oppositely disposed side walls forming elongate heat ducts therein; the heat ducts having openings in their mutually facing surfaces. A modular heating assembly i... | 10/22/1985 |
| 4398082 | Heating apparatus An improved heating apparatus for heating a small room or confined space has an electric heater element affixed to a mounting frame assembly by means of notched heater element supports. The notched heater element supports are operably disposed within slot... | 08/09/1983 |
| 4109138 | Fan-heater appliance with adjustable fan speed A fan-heater appliance, e.g., hair drier, has a tapping arrangement for providing a variable supply to a fan motor to regulate the speed thereof. The tapping arrangement comprises a current collector which is slidable over a row of heads of tubular rivets... | 08/22/1978 |
| 4053732 | Portable electric room air heater A room air heater which includes a vertically disposed tubular housing or casing mounted on a mobile supporting structure for ease of movement to a desired location and including a heat exchange coiled tube communicating with a tank having an electric res... | 10/11/1977 |
| 4003967 | Electric heating and humidifying apparatus A space heating apparatus comprising a main enclosure having a front and a rear wall, side walls and a top and bottom wall. An air inlet opening is provided in the front wall with a filter removably secured therein. An impeller fan is mounted within the e... | 01/18/1977 |
| 3985295 | Heat collector and diffuser A heat collector and diffuser is disclosed for superimposition over elongated fin tube radiators in building heating systems. Blower means induces airflow across an elongated fin tube heat exchanger and into collector ducts which channel the heated air in... | 10/12/1976 |
