Did You Know...
...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 |
| 7814719 | Self-supporting construction element made of expanded plastic material, in particular for manufacturing building floors and floor structure incorporating such element A self-supporting construction element (1) is described, comprising: a) an elongated body (2) made of expanded plastic material; substantially parallelepipedic and provided with respectively lower (8) and upper... | 10/19/2010 |
| 7272914 | Steel joist A joist suitable for use in a composite concrete floor is disclosed. The joist comprises a top chord, a bottom chord; and a vertically extending intermediate web having a top end secured to the top chord and a bottom end secured to the bottom chord. The top chord co... | 09/25/2007 |
| 7251919 | Lightweight building component A structural member includes side walls, a top wall connecting a top region of the side walls, a bottom wall connecting side wall bottoms and extending beyond the side walls to form wings each having one portion of a connector for connecting members to one another, ... | 08/07/2007 |
| 7169464 | Aligned extrudate structure The present invention provides an improved composite material structure having large portions of additive material aligned over a substantial width of a material structure and occupying a larger percentage of the structure volume. The material structure includes a r... | 01/30/2007 |
| 7069703 | Method and system for constructing large, continuous, concrete slabs A method and system are provided for constructing large, continuous, concrete slabs without using conventional shrinkage joints. The system comprises a grid of closely-spaced crack inducers (2) arranged relative to a concrete-pouring surface and adapted to be... | 07/04/2006 |
| 6976337 | Energy-saving housing The invention provides energy-saving housing wherein the indoor temperature condition can be made comfortable throughout the year by a small amount of energy by suppressing loads on cooling and heating devices, and high airtightness and high heat insulation performa... | 12/20/2005 |
| 6293063 | Cast-in-place hybrid building system A pre-cast concrete form for cast-in-place beams and columns and a method of forming the same. The form includes a form body having a channel through a length thereof and a shear bonding key along the length, the channel being adapted to receive cast-in-p... | 09/25/2001 |
| 6237297 | Modular structural members for constructing buildings, and buildings constructed of such members A structural member of this class basically consists of two spaced shell panels and an intermediate core. The shell panels may be made of metal or concrete or combinations thereof, or of other rigid materials having the required physical properties. The c... | 05/29/2001 |
| 5341616 | Concrete insert element and concrete structure having at least one concrete insert element A concrete structure having at least one concrete insert element is disclosed. The insert element has a surface with a layer of aluminum or aluminum alloy and, upon setting of the concrete, the layer of aluminum or aluminum alloy reacts at least partially... | 08/30/1994 |
| 5337532 | Concrete floor system A concrete floor system includes undulating sheet metal formwork for forming concrete slabs with one or more concrete ribs. The system also provides a unique type of bar chair which allows reinforcement in the form of steel rods, for example, to be droppe... | 08/16/1994 |
| 5157887 | Fireproof structural assembly A structural assembly comprises a bar joist having ano utward flange along its base. Expanded metal lath is held in position agains the bars and above the flange by attachment clips. The attachment clips each comprise a U-shaped base which pinches the fla... | 10/27/1992 |
| 5079890 | Space frame structure and method of constructing a space frame structure A space frame structure has parallel spaced lower and upper sub-frames joined by interconnecting members, each sub-frame comprising a multiplicity of members connected in a grid, and a concrete layer secured to the upper sub-frame, wherein the concrete la... | 01/14/1992 |
| 4982538 | Concrete panels, concrete decks, parts thereof, and apparatus and methods for their fabrication and use Concrete panels for making concrete decks or floors for spanning between structural supports; parts of such panels including shear connectors, thread formers, and resilient grout seals; tools for manipulating grout-seals; co-acting forms for making panels... | 01/08/1991 |
| 4729201 | Double top chord A steel joist is disclosed consisting of a web, a bottom chord and a double top chord construction consisting of two elongated substantially identical portions each being of S cross-section and being connected to or integral with the web.... | 03/08/1988 |
| 4660341 | Composite structure An open web joist system and a composite concrete structure incorporating said open web joist system wherein the top chord comprises two spaced-apart angle bars held in spaced-apart relationship by bar stock of an open web member and a closure member for ... | 04/28/1987 |
| 4628654 | Composite floor structures A composite floor structure comprising a floor slab of concrete or other compression resistant material; and at least one reinforced beam under the floor slab. The beam comprises permanent shuttering including an open-mouthed, upwardly facing channel form... | 12/16/1986 |
| 4612751 | Dapped end reinforcement assembly for precast prestressed concrete members A reinforcing structure for precast concrete is provided. The reinforcing structure includes a horizontally disposed bearing plate, and a vertically oriented planar reinforcing mesh extending above, below and inboard of the bearing plate. A vertical react... | 09/23/1986 |
| 4599840 | Cassette for casting of framework A framework cassette of thin sheet intended to be joined to adjacent cassettes so as to constitute a lost form when casting concrete framework and co-operating with the concrete in the finished framework as regards the absorption of forces. It consists of... | 07/15/1986 |
| 4571913 | Prefabricated fireproof steel and concrete beam A composite structural element has a main steel beam having a web and at least two flanges extending therefrom, having oppositely directed outer faces, having outer edges generally defining a plane and defining with the web a recess open away from the web... | 02/25/1986 |
| 4196558 | Fire-resistant concrete and steel structural element A construction element comprises a wide-flange steel beam having a web-flange thickness ratio of at least 0.8. Anchors or holding members in the form of studs or wire fabric are secured only to the web of the beam, and a reinforcing bar or plate extending... | 04/08/1980 |
| 4151694 | Floor system The system is preferably for use in building construction where concrete floors can be poured in place. The components of the system comprise parallel arranged joists preferably each constructed from three pieces to form an I-beam joist, bracing channels ... | 05/01/1979 |
| 4120131 | Building structure This invention relates to a sheet metal structural shape for use in building construction having a generally box shape with outwardly extending flanges at one end of the substantially parallel sides and inwardly extending flanges at the other end of the p... | 10/17/1978 |
