"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 |
| 5118292 | Stress breaker appliance socket The present invention is an improved female joint portion (40) for the Stress Breaker Appliance.RTM. (10). It comprises a wedge shaped female socket (40) which will receive the wedge shaped male member (16) of the Stress Breaker Appliance.RTM. (10). The f... | 06/02/1992 |
| 4519386 | Mouth splint A concealed, resilient and flexible mouth splint for placing in the mouth of an individual around the upper maxillary posterior teeth to affect the tension of the masticator muscles of the individual is disclosed. The device comprises a right channel (22)... | 05/28/1985 |
| 4483677 | Flexible clasp for a removable partial dental prosthesis and method of formation of a combined flexible clasp and stress relieving prosthesis A flexible clasp for removable mounting of a partial dental prosthesis to an abutment tooth is disclosed. The clasp includes a retention arm (42) formed to extend around at least a portion of the side of an abutment tooth (27) to retain the prosthesis in ... | 11/20/1984 |
| 4472142 | Removable partial denture An improved removable partial denture is provided for use in an edentulous space. The denture has a plurality of artificial teeth joined to each other on a base and an attachment means at each of the two ends of the denture for attaching the denture to th... | 09/18/1984 |
| 4412824 | Removable partial dental prosthesis and method of forming and supporting the same A removable partial dental prosthesis is disclosed in which a universal, resiliently displaceable coupling is provided between the abutment tooth from which the prosthesis is stabilized and the base of the prosthesis which rests on the alveolar ridge. The... | 11/01/1983 |
| 4247286 | Stress-relieving hinge for a dental restoration A first hinge member has a serrated shank affixed to a dental restoration section and a spherical pivot-head at the free end of the shank; a pair of oppositely-open, axially-aligned, hemispherical bearing cups are provided on the pivot head for engagement... | 01/27/1981 |
| 4205442 | Dental stress-relieving apparatus A two-part stress-reliever employs a first member supporting an upright flange and a second member bifurcated and straddling said flange. An elongated slot in the flange receives a pass-through pivot pin carried by the second member and said slot also inc... | 06/03/1980 |
| 4014094 | Dental hinge structure A hinge bar and product assembly for use in manufacture of partial dentures including a hinge bar having a cylindrical end surface thereon adapted to be received internal of a mating support member attached to supporting natural teeth. The cylindrical end... | 03/29/1977 |
| 4009519 | Adjustable distal extension hinged stress breaker A distal extension hinged stress breaker for a dental appliance which prevents lateral movement of the hinge. A shank portion is pivotally coupled to a head portion at one end thereof and a rear portion covers the opposite end thereof. The head portion is... | 03/01/1977 |
| 3999297 | Stress breaker appliance The stress breaker appliance includes a main portion for engaging a patient's teeth and a supporting portion for false teeth coupled to the main portion. The coupling is such that the supporting portion can move up and down relative to the main portion so... | 12/28/1976 |