...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8152607 | Portable work station A portable work station including a main housing, a fan and motor housing, transition housing and an exhaust housing with the housings being selectively removably secured together rather than being welded as in the prior art. The work station includes a ballast comp... | 04/10/2012 |
| 7448945 | Clean work booth A mobile clean room has a substantially rectangular frame having an upper and lower portion and is formed of a plurality of metal tube members and transparent plastic wall panels affixed to the frame to form an end wall and front and rear walls. A floor plate is aff... | 11/11/2008 |
| 7406978 | Environmental containment unit A portable enclosure, easily erectable and collapsible, to provide environment control and prevent contaminants from being released from the enclosure. The enclosure provides a flexible envelope attached to the interior of the space defined by vertical and horizonta... | 08/05/2008 |
| 7381127 | Apparatus for transferring hazardous material An apparatus is described for transferring hazardous material between the interior of a container and the chamber of a fume hood having a port that includes a flexible enclosure with an upper surface, a lower surface and a side surface; a first conduit extending fro... | 06/03/2008 |
| 7347773 | Silencer for fume extracting hoods The silencer for fume extracting hoods is comprised of a panel (1) consisting of a lower tray (4), an insulating intermediary sheet (5), and an upper or porous filling foamed material (6) acting as a sound absorbing and limiting or dampin... | 03/25/2008 |
| 7320636 | Exhaust fan assembly having flexible coupling An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner w... | 01/22/2008 |
| 7316720 | Securing device for a filter element A securing device for a filter element, which can be detachably mounted on an extractor hood, has a connecting implement for detachably connecting the filter element to the associated extractor hood. The connecting implement catches the filter element when detaching... | 01/08/2008 |
| 7279021 | Suction device/blower A manually-guided, portable suction device/blower is provided, and includes a blower unit having a motor for driving the blower unit, a blower tube that extends from the blower unit, a collection bag, wherein during suction operation of the suction device/blower, th... | 10/09/2007 |
| 7273413 | Vehicle exhaust system hose and coupling assembly An improved de-coupling device for vehicle exhaust systems specifically emergency vehicle exhaust systems. In this application, flexible hoses are normally utilized as a conduit for exhaust fumes. This invention incorporates a tether inside the flexible hose thereby... | 09/25/2007 |
| 7247087 | Fume hood with air directing member A fume hood adapted to be connected to an exhaust system, the fume hood including a cabinet formed with a chamber having a generally flat bottom wall and a sash door mounted at the front end of the chamber for movement in a vertical plane to provide an access openin... | 07/24/2007 |
| 7241616 | System for culturing human cells and tissues Disclosed is a human cell/tissue culturing system including a plurality of incubators, each incubator capable of aseptically storing/culturing cell(s) or tissue(s) derived from a (human) individual and identifying the cell(s) or the tissue(s) during incubation, wher... | 07/10/2007 |
| 7204462 | Expanding hose holder An insulation delivery apparatus has a hose holder and a nozzle section holder, the nozzle section holder being mounted on an extensible section of the hose holder. ... | 04/17/2007 |
| 7195678 | Method of installing an inspection port onto asbestos insulated pipe and equipment A method of installing an inspection port on a pipe having asbestos insulation extending therearound in which the method has the steps of positioning the inspection port within a glove bag, affixing an opening of the glove bag onto a surface of the pipe, removing a ... | 03/27/2007 |
| 7188636 | Containment cart A portable enclosure apparatus is provided with a frame assembly having a bottom wall, an upper frame member and a single pair of vertical support members. The support members are easily length adjusted by a single user to vary the height of the system while in use.... | 03/13/2007 |
| 7189272 | Movable spray painting stand A movable spray-painting stand includes a worktable provided with four casters and having a wind-exhausting device and a filtering device assembled thereon. The wind-exhausting device has an air inlet communicating with the wind outlet of the filtering device. A sep... | 03/13/2007 |
| 7178521 | Adjustable length breathing circuit A unilimb breathing circuit has a proximal end coupling member, a distal end coupling member, an expiratory tube extending between the proximal and distal end coupling members, and an inspiratory tube extending between the proximal and distal end coupling members. T... | 02/20/2007 |
| 7147553 | Portable smoking room A portable smoking room having a flexible enclosure defining a room detachably mounted on a frame is provided. A duct is detachably mounted to the frame for transporting smoke laden air within the flexible enclosure outside of the flexible enclosure. A fan detachabl... | 12/12/2006 |
| 7134444 | Environmental containment unit A portable enclosure, easily erectable and collapsible, to provide environment control and prevent contaminants from being released from the enclosure. The enclosure provides a flexible envelope attached to the interior of the space defined by vertical and horizonta... | 11/14/2006 |
| 7131839 | Backflow prevention sleeve for suctioning devices A sleeve for preventing backflow and cross-contamination between patients of fluid and particulate matter as well as other contaminants present within a dental/medical suctioning device. The sleeve includes a sleeve inlet end that sealingly attaches to and surrounds... | 11/07/2006 |
| 7104881 | Locator ring insert with baffles A connection assembly for an exhaust extraction system which is designed to vent the exhaust from a vehicle tail pipe includes, in combination, three primary components. One component is an annular sleeve which is constructed and arranged to assemble onto the vehicl... | 09/12/2006 |
| 7083513 | Portable ventilator for work station A portable ventilator for removing deleterious gasses from a welding site provides a funnel-like collection head structurally carried by an electrically non-conductive rigid dispersement tube carrying a powering structure. The powering structure provides pressurized... | 08/01/2006 |
| 6983757 | Pressure differential distribution system An pressure differential distribution system which offers an pressure differential reaction element (1) made of a comfortable, flexible pressure differential interface (2) that is attached to a support element (3), which in conjunction with a di... | 01/10/2006 |
| 6895956 | Remote control system for motor groups for extractor fans, in particular for kitchen extractor fans A remote control system for motor groups (22) for extractor fans (21), in particular for industrial and kitchen extractor fans, according to which the motor group itself (22), provided dismounted from the extractor fan (21), can also be i... | 05/24/2005 |
| 6814658 | Automatic sash return for work chamber A counterweight apparatus is provided for automatically self-returning an enclosure sash or other closure member to at least one preselected intermediate position when released after being opened beyond that intermediate position and for selectively maintaining the ... | 11/09/2004 |
| 6758875 | Air cleaning system for a robotic welding chamber A robotic welding station cleaning assembly (10) for removing particulates from an air-filled chamber surrounding a welding robot (12). A frame (14) is positioned about the robot (12) and includes a top (20) defining an opening ( | 07/06/2004 |
| 6679416 | Multi-functional welding platform A multi-functional welding platform is disclosed. The multi-functional welding platform has a box body at a base thereof. The rear side thereof is installed with a power input end, a power regulator, a high voltage discharging plate, a power output end, e... | 01/20/2004 |
| 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 |
| 6383242 | Mobile enclosure unit A mobile enclosure unit for containment of contaminants has a vertical, wheeled frame assembly having an open upper end and a lower wall. The frame assembly is adjustable in height so that the open upper end can be positioned in contact with a ceiling, al... | 05/07/2002 |
| 6332837 | Device for the removal of gas and particles formed during welding and cutting jobs An arrangement for removing gas, smoke, solid particles and the like in connection with welding and/or cutting consisting of two parts which can be easily latched together, namely an outer housing and an inner part. The outer housing comprises a unit for ... | 12/25/2001 |
| 6322754 | Translatable hood arrangement for a medical-technical or dental-technical worktable The invention relates to a medical-technical or dental-technical work table (1) which in its forward region of its table surface (2a) has a protection arrangement (11) having a protection plate (11c) in upwardly extending arrangement, which protection pla... | 11/27/2001 |
| 6306031 | Firehouse exhaust system An exhaust recovery system vents exhaust from an exhaust pipe of a vehicle, located in an enclosed structure, as the vehicle is driven out of the structure. The system includes a coupling attached to a detachably connectable coupling support assembly to s... | 10/23/2001 |
| 6264711 | Capture of liquid sanding dust atomized overspray blast media and other errant particles in an unenclosed area An apparatus for the capture of overspray, blast media particles, and errant particle generated during spraying without employing an enclosure is disclosed. The apparatus is to be employed proximal a worker on a platform. The overspray capture mechanism i... | 07/24/2001 |
| 6202641 | Hood for cooking areas A hood to be mounted against a wall above a cooking area, comprising filtering elements and fan means which are integrated in a supporting frame and are connected to a control device. The hood further comprises a depth compensation device which is constit... | 03/20/2001 |
| 6139422 | Exhaust gas extraction apparatus for a vehicle shed An exhaust gas extraction apparatus for a vehicle shed includes a running rail arranged in the exit direction of a vehicle in an upper shed region, with a carriage which can travel thereon and an extraction hose hanging down therefrom, with an extraction ... | 10/31/2000 |
| 6116249 | Method and apparatus for extracting particles produced by the treating of human or animal nails Method and apparatus for removing dust produced by the treating of human or animal nails. An air current produced by a fan is directed through an adjustable conduit towards the nails being treated. A funnel attached to a second adjustable conduit leading ... | 09/12/2000 |
| 6036592 | Ashtray assembly for use with smoke removal apparatus An ashtray for use with an apparatus for the reduction of tobacco smoke, the ashtray having a body with a peripheral wall and separating wall for defining a first area for extinguishing a cigarette and a second area for disposing ash therein. The ashtray ... | 03/14/2000 |
| 6012978 | Device for removal of exhausts from vehicles The present invention relates to a device for removal of exhausts from vehicles, which device includes a rail (3) which is mounted in premises in which the vehicle is located when its exhausts shall be removed. The rail (3) may be composed or put together... | 01/11/2000 |
| 5976008 | Elevator assembly for use with smoke reduction apparatus An elevator assembly for use with a second hand smoke reduction device having a chimney assembly for capturing and exhausting smoke away from a smoker, the elevator assembly having a plurality of telescopically arranged support tubes for supporting the ch... | 11/02/1999 |
| 5941766 | Dust collector A fixed torpedo mounted in the center of a funnel assembly for a dust collector removes residue caused by a machining practice applied to a work piece, with enhanced flow characteristics due to the fixed torpedo of a dual cone shape fixedly secured in the... | 08/24/1999 |
| 5934986 | Apparatus for removal of second hand smoke The base attached to the top of a surface and adjustable for positioning directly to the side of the patron, at the level of the patron's face. The chimney assembly is mounted on the base for capturing tobacco smoke. A fan disposed in the chimney assembly... | 08/10/1999 |