Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7275834 | Air guide plate and lamp assembly utilizing the same A lamp assembly and an air guide plate thereof. The lamp assembly and the air guide plate are positioned in a projector. The lamp assembly comprises a base with a bottom portion and an opening, and a lamp with a bulb disposed at the bottom portion in a manner such t... | 10/02/2007 |
| 7258196 | Noise attenuator with laterally moving baffles A silencer or sound attenuator for gas flows that makes use of noise baffles is provided with a lateral movement mechanism which allows the baffles to be moved perpendicular to the direction of the gas flow within the silencer. A silencer provided with the lateral m... | 08/21/2007 |
| 7258607 | Return air grille assembly The present disclosure provides an air grille assembly for use especially with air conditioning and heating ducts, having a detachable grille constructed of a relatively thick material, such as wood, synthetic wood, vinyl or the like. The grille can mount against th... | 08/21/2007 |
| 7131241 | Corrosion resistant window shutter A window shutter has corrosion resistant stiles with a non-metallic core and louvers, and non-metallic top and bottom rails. The shutter is resistant to the adverse effects of sunlight, humidity, rain and wind, and will retard flying objects, and will pass commonly ... | 11/07/2006 |
| 7108600 | Air duct register The present invention provides an air duct registrer for adding forced air (heat, air conditioning), exhausting air or simply to balance air quality. The air duct register has a manifold and is designed with a removable manifold collar connectible to the flexible or... | 09/19/2006 |
| 7086740 | Injection-molded vent screens A projection device is provided, wherein the projection device includes a casing, a plurality of electronic components mounted within the casing, a vent in the casing disposed substantially adjacent to an electronic component, and an injection molded, electrically n... | 08/08/2006 |
| 7081049 | Ventilating system Ventilating system including a case mounted on a ceiling of a room, an inlet in a bottom surface of the case, and an outlet in a side surface of the case, a partition for dividing the case into an upper space, and a lower space, a fan in the upper space of the case,... | 07/25/2006 |
| 7025086 | Reverse flow preventing device and electronic apparatus A reverse flow preventing device arranged in a flow path of fluid formed by a fan and an electronic apparatus equipped with the same. The reverse flow preventing device has a frame, a plurality of support shafts arranged about the center of the frame and mounted on ... | 04/11/2006 |
| 7004233 | Cooling structure for high tension electrical equipment A high tension electrical equipment cooling structure for cooling batteries which supply electricity to the operating motor via an inverter, and the inverter using cooling air, and includes an equipment box for guiding cooling air introduced from a cooling air inlet... | 02/28/2006 |
| 6506113 | Modular air vent assembly kit A modular air vent assembly kit can be used to cover duct openings that supply a flow of heated or cooled air to a room in addition to covering duct openings that receive return air from a room. The modular air vent assembly kit is comprised of a frame, a... | 01/14/2003 |
| 6475079 | Method and apparatus for an air vent assembly A method and apparatus for an air vent assembly is provided in which individual louvers and spacers are connected together to form chevron shaped channels that allow increased air flow while blocking the escape of direct light. The louvers are formed into... | 11/05/2002 |
| 6381976 | Wedge shaped refrigerated display case A refrigerated display case having a substantially wedge shape for displaying items at temperature below the surrounding ambient temperature. The display case includes a cold air discharge having a length and a warm air return having a length substantiall... | 05/07/2002 |
| 6276440 | Device for controlling diffused air An air outlet has a plurality of vertical vortex generating structures 21 in a triangular shape arranged so as to be oriented at an angle θ with respect to diffused air.... | 08/21/2001 |
| 6257976 | Cover for an air register A cover (20) for an air register (500) includes a first frame (22) having a plurality of first columns (24). A second frame (26) is slidabley received by first frame (22) in drawer-like fashion. A scented pad (28), having a congruent plurality of second c... | 07/10/2001 |
| 6083101 | Device for controlling diffused air An air outlet has a plurality of vertical vortex generating structures 21 in a triangular shape arranged so as to be oriented at an angle θ with respect to diffused air.... | 07/04/2000 |
| 5863310 | Grill/filter mounting assembly A grill filter assembly for mounting in the exit or entrance wall opening of a forced air duct wherein the grill plate may be installed in a hinged relation to the duct enabling easy access to the duct opening. In a preferred embodiment, the grill face pl... | 01/26/1999 |
| 5716270 | Frictionally mounted louvered diffuser A louvered air diffuser which mounts to an outlet of an air distribution system of a building and is removed therefrom without tools. The diffuser has two arms which expand resiliently to engage an environmental surface of the air conduit of the distribut... | 02/10/1998 |
| 5586934 | Wall safe A safe is provided for use with a wall having an air duct and an opening to the wall which connects the air duct with a room. The safe includes a housing having an interior dimensioned to fit within the air duct so that the housing is recessed in the wall... | 12/24/1996 |
| 5525145 | Filtering apparatus for a forced air duct grill A filter apparatus has a rigid housing surrounding a piece of preferably self charging electrostatic filter material and having a preferably magnetic attachment device for mounting the filter apparatus directly in front of a grill at an end of a cold air ... | 06/11/1996 |
| 5356336 | Nozzle for discharging air and method An air discharge nozzle and method for vehicles having a grill (21') which has a high degree of visual opacity to enhance design aesthetics, low impedance to air flow so that the face velocity remains high, and which does not significantly affect directio... | 10/18/1994 |
| 5297989 | Nozzle for discharging air and method An air discharge nozzle and method for vehicles having a grill which has a high degree of visual opacity to enhance design aesthetics, low impedance to air flow so that the face velocity remains high, and which does not significantly affect directionality... | 03/29/1994 |
| 5176570 | Filtered cold air baseboard return A filtered cold air return register particularly for base board units which provides for a removable replacement filter section in combination with the normally provided duct covering or end section. The unit provides a filter device for the return air pr... | 01/05/1993 |
| 5163871 | Floor register grill An air register grill includes a plurality of air directing vanes. Each air directing vane includes an air directing curve which meets one side of the grill at a substantially 90° angle. Opposing each air directing side is a relief side which generally m... | 11/17/1992 |
| 5137491 | Air spout device for air conditioning system for use in automotive vehicle An air spout device for an air conditioning system comprises a duct having an intake portion and a ventilator spout. A plurality of guide vanes are arranged in the duct to define passages, and a plurality of dampers are arranged between the intake portion... | 08/11/1992 |
| 5123224 | Drainable louver A drainable louver comprises a frame composed of a sill, a head and a pair of side members forming a rectangular opening and a multiplicity of vertically spaced-apart louver blades extending across the opening between the side members and fastened to the ... | 06/23/1992 |
| 5038577 | Air intake arrangement for air conditioner with dual cross flow blowers The present invention is an air conditioning unit with indoor and outdoor heat exchanger coils and a pair of dual tangential flow blowers. Air flow is induced through the coils at a uniform rate and exhausted through an outlet. A single scroll dividing wa... | 08/13/1991 |
| 4991496 | Air-conditioning duct apparatus with twistable duct vanes An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate an... | 02/12/1991 |
| 4979432 | Air diffuser with rotatably adjustable louvres, especially for an air curtain generator An air diffuser is provided, preferably for an air curtain generator, which consists of a frame within which are located a plurality of louvres. The louvres are striated and rotatably adjustable about respective axes of rotation. To provide for this rotat... | 12/25/1990 |
| 4976115 | Cambered condenser grill An outdoor grill assembly for use in conjuction with an axial fan is disclosed. The assembly has cambered grill elements which increase the fan efficiency and lower the noise level associated with the fan. A grill having mirror image sections of cambered ... | 12/11/1990 |
| 4887522 | Air-conditioning apparatus An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate an... | 12/19/1989 |
| 4869155 | Airflow distribution system for discharging air from a thin plenum, and oven employing same An airflow distribution system for discharging air from a thin plenum chamber into a relatively larger space such as the work chamber of an industrial oven. A distribution plate separating the chambers has discharge openings arranged in pairs, having diag... | 09/26/1989 |
| 4738191 | Aluminum air vent louver An air vent or louver for flush mounting to exterior walls of building comprises a wooden frame having a polygonal shape, a plurality of aluminum fins resembling wooden slats, and an aluminum facing resembling wood brick molding. The aluminum facing is fo... | 04/19/1988 |
| 4699207 | Recreational vehicle incorporating an integrated venting system A recreational vehicle, mobile home or the like having several appliances therein which generate heat and/or gases, such vehicle incorporating an integrated venting system. The venting system includes cool air inlets in a lower portion of the vehicle body... | 10/13/1987 |
| 4549474 | Air conditioner outlet A floor outlet for an air conditioner has a grill which is formed by ring elements whose radial connecting ribs are inclined to impart a vortex flow to the emerging air. A central baffle body is constituted by a disc and a multiplicity of angularly equisp... | 10/29/1985 |
| 4497134 | Exterior louver and louver apparatus Exterior louver apparatus includes a frame (11) with an oblique frame member (15) with a plurality of exterior louvers (19) having pivot pins in the ends with a universal-type joint (46, 47) in the oblique frame member supporting one end of the louver so ... | 02/05/1985 |
| 4425840 | Blower Herein disclosed is a blower which includes an axial flow fan, a body case defining a wind tunnel for the axial flow fan, a wind deflector mounted in the front opening of the wind tunnel for free rotations therein, and a guard mounted in the rear opening ... | 01/17/1984 |
| 4334899 | Snap filter grill and assembly A filter assembly for use especially with air conditioning and heating ducts, comprising first and second rectangular frames, the latter frame being detachably positioned in the first one, and a filter element sandwiched between the rear end of the second... | 06/15/1982 |
| 4089257 | Ventilation grille or grating The invention relates to a grille or grating for fitting in the floor or wall or ceiling of an enclosed space, for example at the terminal outlet of a ventilating or air conditioning duct, and provides a grille which comprises a plurality of blades of gen... | 05/16/1978 |
| 4020752 | Air diffuser with modular core An air diffuser with a modular core is disclosed in which the diffuser comprises a fixed rectangular framework retaining a plurality of removeable rectangular core elements. The direction and volume of air distributed by the diffuser is selectively change... | 05/03/1977 |
| 4020753 | Ventilation extension unit A portable air duct extension for a building heated or cooled by air and having a hot or cold air outlet or register. The duct extension comprises an elongated tubular member composed of telescoping sections. One section has an inlet opening and the other... | 05/03/1977 |