Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7415803 | Double-wing wing nut anchor system and method A system includes a back up wall and a veneer wall spaced from the back up wall. An anchor shaft has a first end secured to the back up wall, and a second free end of the shaft projects into a space between the back up wall and the veneer wall. A wing nut has a cent... | 08/26/2008 |
| 7337932 | Hanger beam construction An I-beam having a web curved in two dimensions is used to provide an enhanced stiffness to weight ratio for molded plastic hangers. The I-beam includes first and second generally parallel flanges which extend in a longitudinal direction. The flanges are joined by a... | 03/04/2008 |
| 7299593 | Metal half wall and a connector assembly for securing studs of a half wall to an underlying support structure A metal half wall is provided, with the wall including a lower track, an upper track and a series of spaced apart studs extending between the two tracks. A connector is disposed adjacent each stud for connecting the stud to the lower track and to a support structure... | 11/27/2007 |
| 7293394 | Buckling opposing support for I-joist A support device is provided for the preferred application of buckling opposing support of an I-joist having an erroneously cut hole in its web portion. The support device may have an approximate U-shape with two substantially parallel bridging structures combined b... | 11/13/2007 |
| 7228805 | Temperature controlled railway car A composite box structure mounted on and attached to a railway car underframe to form a temperature controlled railway car. The composite box structure defined in part by an exterior metal surface, interior side stakes and at least one layer of fiber reinforced mate... | 06/12/2007 |
| 7207148 | Wall structures A downwardly opening upper channel member (10) is positioned above an upwardly opening lower channel member (12). A lower end portion of the stud (14) is received in the lower channel member (12). An insert (54) is received in the ... | 04/24/2007 |
| 7178303 | Friction stir welding hollow frame member This invention provides a configuration of a joint that allows a satisfactory welded joint to be formed with reduced deformation of the joint region when two-face structures (panels) are friction-welded end to end. The panels 31, 32 each have two substantiall... | 02/20/2007 |
| 6976343 | Compressive flange sinusoidal structural member A sinusoidal structural member having a dual component flange is provided. In the preferred embodiment, the flange (both upper and lower) is comprised of at least two components. These two components can be produced by dividing the flange lengthwise; where the divis... | 12/20/2005 |
| 6976344 | Method of assembling concrete panel building module with connection plates and resulting module A method of constructing building module and resulting building module are provided, the building module including a building floor panel oriented substantially horizontally; a number of exterior wall panels having exterior wall panel faces and exterior wall panel e... | 12/20/2005 |
| 6941875 | Temperature controlled railway car A composite box structure assembled on and securely attached to a railway car underframe to form a temperature controlled railway car or on insulated boxcar. The composite box structure defined in part by an exterior metal surface, interior side stakes and at least ... | 09/13/2005 |
| 6898918 | Honeycomb rivet The invention provides a rivet and method of installing the rivet to attach honeycomb material to other materials. The rivet is installed by drilling a hole through the materials. A back side sleeve of the rivet is inserted through one end of the hole while a front ... | 05/31/2005 |
| 5983574 | Merchandise display panel A merchandise display panel comprises a plurality of profiles including outer edges, the profiles being arranged in a stacked edge-to-edge configuration; and a plurality of stiffeners glued to the back surfaces of the profiles across the edges between adj... | 11/16/1999 |
| 4986867 | Method of manufacturing a prefabricated vehicle window The present invention generally relates to the mounting of windows in a frame, particularly to the mounting of windows of a vehicle, e.g. an automobile, in the body frame work. The invention provides a method for manufacturing a window ready to be mounted... | 01/22/1991 |
| 4441293 | Construction panels A construction panel comprises a non-combustible fire-resisting board e.g. of fibre-reinforced cement or calcium silicate binder, faced on one or both of its major faces with a metal facing. A "floating floor" for marine use is formed by joining the panel... | 04/10/1984 |
| 4267954 | Method of making nailable steel floor channels A steel floor construction for freight hauling vehicles includes a plurality of elongated floor planking members arranged in side-by-side relation to provide a load bearing floor with a nailing groove between adjacent planking members. Each plank includes... | 05/19/1981 |
| 4224880 | Railway car nailable floor A nailable floor panel structure including a plurality of generally inverted-channel shaped parallel floor planks with depending flanges disposedly downwardly in generally abutting relation, and generally linear end caps affixed and rigidly interconnectin... | 09/30/1980 |
| 4194330 | Nailable steel floor channel with anti-skid surface A steel floor construction for freight hauling vehicles includes a plurality of elongated floor planking members arranged in side-by-side relation to provide a load bearing floor with a nailing groove between adjacent planking members. Each plank includes... | 03/25/1980 |
| 4010587 | Nailable flooring construction Nailable flooring is constructed of identical floor units having roll-formed therein closed bottom nailing grooves of serpentine contour for the retention of nail fasteners held in place as they are deformed upon insertion into the grooves. The grooves ar... | 03/08/1977 |
| 3945164 | Nailable hollow structural member A nailable hollow structural member comprising an elongated hollow member of sheet metal formed to define opposed clamping walls and end walls spaced apart between the clamping walls. The clamping walls extend in substantially parallel planes. An elongate... | 03/23/1976 |
