"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 6428029 | Wheelchair frame A wheelchair frame for flexing to accommodate irregularities in the ground consists of a generally rectangular structure having side rails joined by front and rear cross members. One of the cross members is rigid, and receives the side rails through apert... | 08/06/2002 |
| 6408982 | Emergency passenger evacuation chute and chute/slide combination for aircraft A passenger evacuation arrangement for emergency use in aircraft, and in particular for evacuating passengers from an upper deck or decks of a multi-deck aircraft safely to ground level, which is compact when stowed and which safely, rapidly and effective... | 06/25/2002 |
| 6322618 | Adjustable duct assembly for fume and dust removal and filter cleaner An adjustable duct assembly for the collection of fumes, dust and the like comprises two duct sections connected end to end by a duct support system comprising two elongate arms pivotally connected, the arms attached to the adjacent ends of the ducts, ext... | 11/27/2001 |
| 6119847 | Folding auger A conveyor for transporting grain or the like consists of three or more sections foldable about two axes of rotation displaced from each other. Separate retractors operate to fold the conveyor about the two axes. A link connecting the first and second ret... | 09/19/2000 |
| 6038810 | Plant enclosure for outdoor use A plant enclosure for outdoor use has a hollow body with open upper and lower ends and ventilation and drainage openings. In order to permit a desired amount of water to be conserved within the base of the enclosure, the openings are positioned such that ... | 03/21/2000 |
| 5802790 | Decorative moulding corner cap The invention consists of an assembly for capping one or more exposed ends of a moulding, in particular where two elongate moulding pieces meet at a corner. The assembly consists of upper and lower rims and a web portion extending between the rims. The ri... | 09/08/1998 |
| 5733158 | Inflatable reversible life raft An inflatable life raft incorporates upper and lower canopies that are raised automatically above the upper or lower sides of the raft, respectively, depending on which side of the raft is facing upwardly when the raft is floating. The canopies each form ... | 03/31/1998 |
| 5711580 | Extendible and elevating footrest for wheelchair The device is a footrest support structure for attachment to the frame of a wheelchair. A footrest is carried on the end of a telescoping leg pivotally engaged to a wheelchair frame. The telescoping leg automatically extends as it is elevated, by means of... | 01/27/1998 |
| 5711123 | Decorative moulding with removable decorative panel The invention is a decorative molding characterized by an elongate channel recessed into its front face and adapted to releasably retain an elongate strip-like panel in either a concavely-flexed position or a flat or convex position. Retention means for t... | 01/27/1998 |
| 5661464 | Snow pack stability monitor Apparatus comprises a probe for measuring snow pack movement, comprising a mobile element adapted to contact and be displaced by the snow pack, a static element linked to the mobile element by linkage means and adapted to remain stationary relative to the... | 08/26/1997 |
| 5655588 | Angled valances The invention is a decorative valance, consisting of a box-like structure made up of rigid front and side panels. The panels are canted outwardly an upwardly away from the vertical by about 45 degrees. The panels may each consist of generally channel-shap... | 08/12/1997 |
| 5636486 | Brick tie A masonry tie is provided for engaging a masonry veneer to an underlying support wall. The tie includes a rod and a stud engagement member engageable to the rod. The stud engagement member comprises first and second clamp members that clampingly engage a ... | 06/10/1997 |
| 5579816 | Boom-mounted manipulating grapple A boom-mounted grappling and manipulating apparatus is provided that may be rotatably mounted on a vehicle, comprising an articulated boom with a grappling and manipulating head rotatably and pivotally mounted thereto. The head is provided with opposable ... | 12/03/1996 |
| 5553653 | Cord retractor for window blinds A cord retractor is provided to take up the dangling cords of a window blind. The retractor comprises a sliding cord engagement member housed within a hollow wand. The wand has an axial slot extending the length of its sidewall. A handle outside the wand ... | 09/10/1996 |
| 5525915 | Electrical conductivity tester for ropes A tester is provided for measuring the dielectric integrity of a rope, on a continuous basis. The device incorporates a pair of rope contact and retention members, that may comprise pair of spring-loaded clamps, adapted to make electrical contact with the... | 06/11/1996 |
| 5482140 | Board inverter for use in lumber processing machine A rotary board inverter is provided for use in a conveyor for a lumber processing machine, with the motive force to invert the boards being provided by the forward motion of the boards themselves as they are transported along the conveyor. The device comp... | 01/09/1996 |
| 5473833 | Clip-on price ticket channel cover for metal shelving A clip-on label holder and cover is provided for insertion in a price ticket channel member of a shelf. The cover comprises an elongate clear plastic strip, having a clear plastic display panel and an integral clip. A label, such as a data strip, may be i... | 12/12/1995 |
| 5472257 | Vehicle protective cover A protective cover for a vehicle comprises a flexible sheet retractible into a case mountable to a first end of a vehicle. The cover includes a flexible sheet having an array of cords extending longitudinally along the sheet, each cord being fixed at a di... | 12/05/1995 |
| 5465779 | Integrated cord loop drive means and housing for window covering A housing to enclose the exposed portion of the cord loop of a window blind or other window covering includes an integral drive arrangement to cycle a cord loop through the headrail of the blind, in order to open or close the blind. The cord loop is retai... | 11/14/1995 |
| 5441090 | Tree cutting and wood manipulating grapple A gripping apparatus is provided that may be rotatably mounted on a vehicle, comprising an articulated boom with a gripping head rotatably and pivotally mounted thereto. The head is provided with opposable jaws comprising jaw members that apply an even pr... | 08/15/1995 |
| 5412220 | Optical scanning device for lumber The present invention relates to an optical scanning device for use in sawmills, to determine the severity and location of surface defects on lumber, for the purpose of grading and trimming, having a plurality of optical scanning means mounted to a frame ... | 05/02/1995 |
| 5408960 | Pre-heater for liquid-cooled internal combustion engines An engine heater is provided for installation in a liquid-cooled internal combustion engine. The heater includes an electrical resistance heater element and a pump driven by an electric motor to circulate heated fluid through the engine. A thermostaticall... | 04/25/1995 |
| 5396722 | Picture frame members A picture frame member is provided, having a releasable picture and backing board clip, the clip being adapted to grip the picture and mounting board independently of each other.... | 03/14/1995 |
| 5385150 | Acupuncture device An apparatus is provided for determining acupuncture cutinous points within an animal body, in particular a human body. The apparatus may also provide therapeutic acupuncture treatment in the form of electrical pulses. The apparatus comprises a housing, e... | 01/31/1995 |
| 5375500 | Tunable drum A tunable drum is provided, having drum body comprised of first and second parts adjustable relative to each other such that the first part may be moved either towards or outwardly away from the second part. The skin of the drum is fastened to the second ... | 12/27/1994 |
| 5376265 | Ozone/water contactor An gas/fluid contactor is provided for reacting water and other fluids with an ozone-containing gas. The contactor comprises an elongate tubular reaction chamber having a gas/fluid combining chamber adjacent the inlet to draw an ozone-containing gas into ... | 12/27/1994 |
| 5354011 | Take-up reel for window blind cords A take up reel for window blind cords, comprising a rotatably driven spool having a cord attachment member fixedly engaged thereto and spaced apart from a cord receiving surface of the spool. The member is adapted to alternatively slidingly engage a cord ... | 10/11/1994 |
| 5351748 | Tubular pin fin heat sink for electronic components A heat sink is provided, comprising a base with an array of tubular pins extending outwardly therefrom. The pins are engaged within apertures recessed into the base by means of an expansion member positioned within the tubular portion of each pin, wherein... | 10/04/1994 |
| 5292031 | Container for contact lens solution A dispenser for contact lens solutions is provided, comprising a support structure and at least one flexible and collapsible container supported therefrom. An outlet extends from the bottom of the container, the outlet having a valve adapted to allow the ... | 03/08/1994 |
| 5279473 | Cord retraction device A cord retraction device specifically adapted for use with window blinds is provided, having cord attachment member adapted to engage a cord loop to a take up spool, wherein the loop is free to slide through the attachment member when the cord is in the u... | 01/18/1994 |
| 5219013 | Curtain retainer The present invention relates to a curtain retainer. The curtain retainer is comprised of a retainer element having a pair of parallel elongate members having a gap therebetween and having inside and outside faces. A support is provided to support the ret... | 06/15/1993 |