William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7857689 | Air handling system with self balancing air entrance door A self balancing air handling system for conditioning an interior space includes an air handling unit having an outlet for supplying conditioned air to the space, an entrance providing an access from an exterior space to the interior space, an air plenum surrounding... | 12/28/2010 |
| 7357131 | Air curtain door system for an oven An air curtain door system for inhibiting heat and exhaust exiting from an access opening of an oven includes a door panel which has an access opening and a mantle attached to a bottom end of the access opening, the mantle having an air outlet slot extending horizon... | 04/15/2008 |
| 7249737 | Cell door system for aircraft security A generally cylindrical security door module is designed for retrofit into the passageway of an aircraft leading to the cockpit. Two doors, forward and aft, are provided which are mounted for opening and closing upon commands emanating from the cockpit. Both doors a... | 07/31/2007 |
| 7216396 | Debris blower apparatus A debris blower apparatus for entrances to garages and working and living spaces comprises a blower assembly connected to an elongated nozzle assembly. The nozzle assembly mounts to the floor or doorsill of the protected space and comprises a plurality of nozzles al... | 05/15/2007 |
| 7147460 | Device for shaping plastic objects under inert atmosphere The invention relates to a device for producing plastic articles by forming them in an inert atmosphere, the device comprising a hopper, a feed screw and means for forming the polymer melt. The device for injecting inert gas comprises a gas feed pipe, a gas injectio... | 12/12/2006 |
| 7137775 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 11/21/2006 |
| 7052390 | Revolving door A revolving door for installation in a building, comprising a cylindrical shell wall, within the shell wall door leaves rotating about a central shaft and between a bottom plate and a top plate, and entrance and exit openings provided in the shell wall, at least one... | 05/30/2006 |
| 7044850 | Open patient care unit An open patient care unit with a bed (1), with inner and outer air discharge channels (20, 30) extending around the bed (1) at least over some sections, and with at least one air exhaust or a purgative suction unit (4) arranged above the ... | 05/16/2006 |
| 7040978 | Sliding door device The invention concerns a sliding door device (10) comprising at least a mobile sliding door (11) and separating elements (12) for maintaining and guiding the mobile and removable sliding door (11). The latter enables automatic opening and... | 05/09/2006 |
| 7037189 | Air shutter and installation method thereof An air shutter of low cost, high efficiency, and easy maintainability is provided, which can interrupt efficiently the flowage of air across a doorway when the door is open based on the consideration of the experimental data of the flowage of air across the opening ... | 05/02/2006 |
| 7014672 | Carrying vehicle, manufacturing apparatus, and carrying system According to the present invention, in a carrying system comprising a carrying vehicle and a manufacturing apparatus the interior of which is kept cleaner than a surrounding environment, manufactured articles to be transferred are prevented from being contaminated b... | 03/21/2006 |
| 6960129 | Conditioned vestibule for a cold storage doorway A conditioned vestibule for a cold storage doorway is disclosed. The vestibule includes a frame that supports inner and outer moveable door-forming members. The vestibule also includes a heater that circulates air between the inner and outer door-forming members and... | 11/01/2005 |
| 6959748 | Apparatus for covering an opening in a building A storm protector (20) to be attachable over a window (21) or other opening of a building (22) includes a header (26), a bottom sill (25) and side frames (23, 24) extending between the ends of the header (26) and the ... | 11/01/2005 |
| 6836906 | Eye protection device With reference to FIG. (2), a helmet (2) for an aircraft crew member (1) is provided with a device (10) for forming an eye-shielding curtain (11) of air in front of the crew members eyes. The air exhausts to the ambient atmosphere ... | 01/04/2005 |
| 6797029 | Process facility having at least two physical units each having a reduced density of contaminating particles with respect to the surroundings In a process facility for producing semiconductor wafers, a third physical unit is configured between two physical units that produce mini environments. The third physical unit has a laminar flow at right angles to the laminar flows of the two physical units and is ... | 09/28/2004 |
| 6776710 | Vent structure for slotted outlet with uniform velocity profile A vent structure comprises an inlet-connector section, an outlet section, and a transition section between the inlet-connector section and outlet section. The inlet-connector section is at an inlet end of the vent structure and is adapted for connection with an inle... | 08/17/2004 |
| 6755036 | Confined space conditioning system The present invention is a confined space conditioning system, which is used to provide conditioning to localized zones of an enclosure. The confined space conditioning system consists of a conditioning unit and an enveloped space, enveloping the localized zone, con... | 06/29/2004 |
| 6733557 | Device for diffusing sterile air An installation includes a worktop, a first wall and a device for the close protection of products arranged on the worktop, whereby the products are sensitive to contamination from the ambient environment. The products are protected by diffusion of a sterile air str... | 05/11/2004 |
| 6705940 | Portable doorway bug deflector Insects, debris and the like are prevented from moving into a building via an open door by a fan unit that is mounted on the side of the doorway to extend for the entire length of the door and to direct air outwardly with respect to the building at an oblique angle ... | 03/16/2004 |
| 6702663 | Arrangement for producing an air partition An arrangement for producing an air partition on a passage between rooms with different air temperatures has a first ventilator whose air intake is arranged in a first room, and whose pressure side is located on a heating device having one heating element... | 03/09/2004 |
| 6632260 | Adjustable clean-air flow environment Enclosures having adjustable clean gas flow environments and methods of enclosed pressure differential distribution technology. Specifically, clean gas flow enclosures, which provide for the isolation of materials from airborne micro-particulate contamina... | 10/14/2003 |
| 6623538 | Sterile laminar airflow device A compact, portable, lightweight, low power consuming, convenient, versatile and sterile laminar airflow device, useful in obtaining a workspace substantially devoid of airborne particulate contaminants, said device having a body (C) divided into an upper... | 09/23/2003 |
| 6623352 | Vortex air barrier An air barrier system is disclosed that allows the isolation of a central volume or one volume from another without the use of physical barriers. Toroidal vortices are formed at opposing end or ends of the volume to be isolated and prevent transport inwar... | 09/23/2003 |
| 6595429 | Apparatus and method for providing continuous real-time conditioned air curtain An air curtain providing an air stream across a doorway between areas of relatively cool and warm air masses and continuously monitoring the condition, e.g., temperature, pressure and flow rate, of one or both air masses and the air stream. The air curtai... | 07/22/2003 |
| 6569696 | Device and method for manufacturing semiconductor A heat exchange section (72) is provided in the middle of a circulation water path (58, 59) connecting between a temperature-controlled water tank (71) and a semiconductor manufacturing apparatus body (4) so as to perform a heat exchange with air of a cle... | 05/27/2003 |
| 6532761 | Low temperature physical distribution system and method and apparatus for maintaining quality in auction market The present invention provides low temperature zone forming equipment having a storage function capable of controlling temperature and humidity and a method and equipment for maintaining the quality of hauled fishes in an auction market of marine products... | 03/18/2003 |
| 6470698 | Freezer/refrigerator car A freezer/refrigerator car equipped with a freezer/refrigerator having a carry-in/out opening formed at a rear end thereof for carrying the goods in and out, and a door mechanism for opening and closing the carry-in/out opening, wherein the door mechanism... | 10/29/2002 |
| 6450879 | Air curtain generator An air curtain generator includes a casing with a fan received therein so as to blow an air curtain from opening of the casing. Two arms are pivotally connected to two end members on two ends of the casing. and each arm is pivotally connected to a fixed m... | 09/17/2002 |
| 6442957 | Refrigeration for vehicle The invention relates to a vehicle for transporting products, comprising: a truck; a cargo space arranged on the truck for receiving the products during transport, with at least one access door; and an air curtain device close to the access door which, at... | 09/03/2002 |
| 6431978 | Slot outlet arrangement for air screen installations A slot-shaped outlet having first flow guide means extending in the interior space of a flow chamber. The flow guide means are extensions of the parallel arranged longitudinal side flanks that extend from the outside to the inside of the slot outlet. The ... | 08/13/2002 |
| 6390755 | Exhaust device for use in a clean room, cleanroom, and method In a single cleanroom (200) for first (230) and second (240) wafer processing machines, an exhaust device (260) surrounds the second machine (240) that temporarily produces exhaust gas (250) which is detrimental to the processes in the first machine (230)... | 05/21/2002 |
| 6375562 | Sliding door The invention relates to a sliding door with two outer side-pieces extending from a building wall and surrounding a building entrance/exit, with at least one moving panel associated with the two side-pieces which closes or opens an entrance/exit as a resu... | 04/23/2002 |
| 6318110 | Artificial snow system with air roof A facility including an inclined plane for sliding for which snow is used, a snow producing apparatus for producing snow from water and supplying the snow to the facility, and an air jet apparatus for forming an air roof by air flow so that the air roof c... | 11/20/2001 |
| 6248146 | Induction assembly for high efficiency air filter An induction assembly (100) for a high efficiency air filter includes a primary intake plenum (102), a primary throat aperture (106), a secondary intake plenum (112), a momentum transfer section (114), a static regain section (116), and a discharge openin... | 06/19/2001 |
| 6234892 | Device for producing hot air curtains for door openings in local transit vehicle A device for producing air currents at door openings provided for passing people in local transit vehicles has a unit for forming an air current which forms a barrier against penetration of cold air into a space disposed behind a door opening, the unit be... | 05/22/2001 |
| 6146267 | Device for separating two zones with different environment The invention concerns a device for separating (100) a first (10) from a second zone (20) in which prevails different kinds of environment. The invention is characterised in that it comprises: a buffer zone (110) extending along a longitudinal axis X betw... | 11/14/2000 |
| 6098676 | Aseptic liquid fillings Process and apparatus for providing a HEPA air shower to the critical fill zone of the liquid filling operation for preventing entry of particulate, non-viable and viable particulate, into the critical filling zone by providing opposed flows of pressurize... | 08/08/2000 |
| 6095918 | Method and device for protecting a work surface A method and apparatus for closely protecting a workstation. The method includes the steps of (a) providing a horizontal work surface having a top face, an upstream side and a free side opposite the upstream side, the free side having an edge, the work su... | 08/01/2000 |
| 5992412 | Filtered smoke screen A smoke diverter system is provided including an elongated ceiling housing, an elongated outlet slot formed along a length of a bottom face of the ceiling housing. An elongated inlet slot is formed along a length of one of a pair of side faces of the ceil... | 11/30/1999 |
| 5947170 | Aseptic liquid filling Process and apparatus for providing a HEPA air shower to the critical fill zone of the liquid filling operation for preventing entry of particulate, non-viable and viable particulate, into the critical filling zone by providing opposed flows of pressurize... | 09/07/1999 |