"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8029281 | Separating ring A separating ring having a body being a resilient bent open ring and having two bent side bars having distal ends and wedge legs formed respectively on the distal ends, the wedge legs being spearheaded and fit easily between adjacent teeth to allow dental operations... | 10/04/2011 |
| 7293987 | Adjustable bite ramps for deep bite correction and kits incorporating bite ramps An adjustable bite ramp includes a tooth-attachment element and ramp element. The tooth-attachment element is sized and configured for bonding to the lingual surface of a person's tooth, while the ramp element is hingedly or bendably adjustable relative to the tooth... | 11/13/2007 |
| 7284983 | Matrix band retainer A matrix band retainer for dental restoration has a unitary member of a stiff planar spring material. The unitary member has an open ring substantially in a first plane, with the plane of the material of the ring perpendicular to the first plane. A tine at each end ... | 10/23/2007 |
| 7226287 | Kits comprising a plurality of bite ramps having different angles for orthodontic treatment A bite ramp includes a tooth-attachment element and ramp element. The tooth-attachment element is sized and configured for bonding to the lingual surface of a person's tooth, while the ramp element may be either fixed or else hingedly or bendably adjustable relative... | 06/05/2007 |
| 7214058 | Dental matrix positioned by slidably engaged matrix retainer A device is disclosed for applying and holding a dental matrix strip against the side of a tooth which is to be filled. An embodiment of the device comprises a split ring that slidably receives a matrix. The split ring in this embodiment can have cushions on its end... | 05/08/2007 |
| 7175432 | Dental contact matrix limited A dental contact matrix system is described for the placement of dental fillings. The dental contact matrix system includes a matrix, a retainer for placing and retaining the 5 matrix and an elastic wedge. The retainer includes two lugs or tines that fit between two... | 02/13/2007 |
| 7108509 | Device for pushing away a dental element, and method for filling dental elements Device for pushing away an enclosure arranged around a dental element. When filling dental elements, it is important that adjacent dental elements should come into contact with one another at a defined location. To this end, the invention proposes a tool for pushing... | 09/19/2006 |
| 7083412 | Dental tooth spacer assembly An improved dental tooth spacer assembly provides a safe separation of the restoring tooth and the adjacent tooth during dental procedures. The improved dental tooth spacer assembly includes a separating portion made of a durable flexible material, and comprising a ... | 08/01/2006 |
| 6988887 | Orthodontic separators An orthodontic separator, dimensioned such that it can be inserted between adjacent teeth. The separator is characterized in that it exhibits an increase in compressive force after insertion between adjacent teeth in the oral environment. The separator, after insert... | 01/24/2006 |
| 6960082 | Atraumatic approximal space dilator The invention relates to a dental device for dilating interdental spaces. The device comprises two interdental matrices that can be inserted into interdental spaces two retaining arrangements to retain the interdental matrices, and a spacer device for guiding the re... | 11/01/2005 |
| 6336810 | Ring for use in preparing teeth for restoration The invention is an open-ended ring used in the preparation of a tooth for a restorative procedure. The ring is used in conjunction with a shield to secure the shield between a tooth to be restored and an adjacent tooth. The result is a close contact bein... | 01/08/2002 |
| 5564928 | Retrievable cemented prosthodontic apparatus A method and apparatus for setting and removing a cemented, retrievable prosthodontic appliance using a levering instrument applied to the gap between two parallel surfaces, the first surface being a flat-topped ledge of a window on the lingual aspect of ... | 10/15/1996 |
| 5505618 | Tooth spacer The tooth spacer comprises an elongated body having two opposite side edges extending between gingival and occlusal edges. A recessed or thin central portion of the body extends from the gingival edge toward the occlusal edge. The recessed central portion... | 04/09/1996 |
| 4878508 | Dental device for cleaning teeth A dental device for cleaning teeth includes a resilient, elongated body member. The body member has two sides joined together so as to form a substantially V-shaped cross-section. Both inner and outer surfaces of each side include texturing in the form of... | 11/07/1989 |
| 4718852 | Kit of armamentarium for restoring posterior teeth with interproximal decay A novel method of restoring posterior teeth such as molars affected by interproximal decay includes drilling the affected tooth, on the side thereof on which the decay is located, essentially horizontally from the buccal to the lingual surface on a line i... | 01/12/1988 |
| 4384854 | Anterior splint An improved anterior splint that enhances fitting a wire mesh strip to the lingual surfaces of the teeth regardless of tooth crowding, for enhanced bonding, and adds increased labial stability to prevent labial tooth movement that can act after installati... | 05/24/1983 |
| 4217099 | Device for inserting elastomeric separation rings between teeth A device for inserting an elastomeric separation ring between adjacent teeth in a person's mouth, comprising a ring holder comprising a stem adapted to extend through and to hold a series of rings, a closed loop of strand material extending from one end o... | 08/12/1980 |
| 4204330 | Method and apparatus for extracting teeth This invention relates to an improved tooth elevator characterized by a bit terminating in a blade having a generally S-shaped or reverse S-shaped cross section. The invention also encompasses the novel method of extracting at least one of a pair of adjac... | 05/27/1980 |