Patents by Inventor David R. Stevens
David R. Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6307955Abstract: An electronic signature management system includes a graphic tablet digitizer for signaling position coordinates of a stylus being moved to produce a handwritten signature, a clock circuit of the digitizer defining a fixed interval between successive stylus position measurements, a computer processor electrically interfaced with the tablet and programmed for receiving and storing a multiplicity of the coordinates in sequential order as an electronic signature forming a time history of the stylus movement.Type: GrantFiled: December 18, 1998Date of Patent: October 23, 2001Assignee: Topaz Systems, Inc.Inventors: Anthony E. Zank, David R. Stevens
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Patent number: 5565495Abstract: Selegiline, or a pharmaceutically acceptable salt form of selegiline, is administered to mammals commencing at a point in time at which at least 50% of the mammal's life span is completed, with the administration continuing on a periodic but regular basis over the remaining life span of the mammal. The treatment, which shifts the survival curve, is especially useful for dogs.Type: GrantFiled: September 6, 1994Date of Patent: October 15, 1996Assignee: Deprenyl Animal Health, Inc.Inventors: David R. Stevens, William W. Ruehl
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Patent number: 5561163Abstract: Selegiline and pharmaceutically acceptable analog forms thereof are used as treatments for hearing loss in mammals, especially dogs.Type: GrantFiled: June 7, 1995Date of Patent: October 1, 1996Assignee: Deprenyl Animal Health, Inc.Inventors: William W. Ruehl, David R. Stevens
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Patent number: 5535314Abstract: A video image processor (100) for processing video images performing the steps of generating video images (103) with a multi-spectral video source (102), converting analog color data contained in the generated video images (103) to digital color data for subsequent signal processing, extracting the digital color data from designated areas of the generated video images and utilizing the extracted digital color data for identifying a color distinguishable from a background color. Thus, the video image processor (100) processes the generated video images and has an intrinsic immunity to the effects of shadows by exploiting multi-spectral color information to distinguish, for example, a passing vehicle from the roadway 116. In a preferred embodiment, the video image processor (100) includes a multi-spectral video source (102) for generating the video images.Type: GrantFiled: November 4, 1991Date of Patent: July 9, 1996Assignee: Hughes Aircraft CompanyInventors: James F. Alves, Gerry R. Cacnio, David R. Stevens
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Patent number: 5493072Abstract: A series connected capacitive graded high voltage cable terminator and suspension insulator made up of a number of individual modules each made by molding an insulating material between and around two flat, parallel plates molded of conductive material. The modules are connected in series by stacking them and the cable shield is introduced at one end while the bare conductor emerges from the stack cap. The electrical stress is uniformly divided by the number of capacitors in the series. The stack can also be used to suspend a bare high voltage conductor from a grounded tower.Type: GrantFiled: June 15, 1994Date of Patent: February 20, 1996Assignee: Amerace CorporationInventor: David R. Stevens
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Patent number: 5387615Abstract: Use of L-deprenyl for treatment of immune system dysfunction for mammals.Type: GrantFiled: August 27, 1993Date of Patent: February 7, 1995Assignee: Deprenyl Animal Health, Inc.Inventors: Norton W. Milgram, David R. Stevens, Gwendolyn O. Ivy
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Patent number: 5276057Abstract: Use of l-deprenyl for treatment of immune system dysfunction for mammals.Type: GrantFiled: November 12, 1992Date of Patent: January 4, 1994Assignee: Deprenyl Animal Health, Inc.Inventors: Norton W. Milgram, David R. Stevens, Gwendolyn O. Ivy
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Patent number: 5215475Abstract: Devices for use with high voltage system components for the safe expulsion of conductive moisture within such components include elbow and T-shaped connector bodies composed of insulating elastomeric bodies covered with conductive elastomer layers. The horizontal legs include all components normally found in such components. The bore of the vertical leg provides a circuitous passage from the horizontal leg to a container or the soil for the collection of such moisture. The circuitous path prevents the moisture from leaving as a stream and the grounded metal cap at the vertical leg extremity discharges any charge carried by the moisture. The circuitous path can be provided by modules each having a curved, linear or combined path such that the total path is longer than the length of the vertical leg. A vacuum access port can provide a means to draw out the moisture if gravity is insufficient to withdraw the moisture from the high voltage system components.Type: GrantFiled: July 2, 1992Date of Patent: June 1, 1993Assignee: Amerace CorporationInventor: David R. Stevens
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Patent number: 5106619Abstract: Vaccines employing inactivated viruses having improved retention of antigenic characteristics are prepared by psoralen-inactivation of the live virus in a non-oxidizing atmosphere. By excluding oxygen and other oxidizing species from the inactivation medium, degradation of the antigen characteristics resulting from irradiation with ultraviolet light is largely prevented. The resulting inactivated viruses are employed in vaccine preparations for the inoculation of susceptible hosts to inhibit viral infection.Type: GrantFiled: January 10, 1990Date of Patent: April 21, 1992Assignee: Diamond Scientific Co.Inventors: Gary P. Wiesehahn, Richard P. Creagan, David R. Stevens, Richard Giles
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Patent number: 4946393Abstract: The invention is the provision of an access to the interior of a high voltage separable connector component by providing a projection of insulating elastomeric material integral with the insulating material of the body of the component and in engagement with the conductive elastomeric material shield of such component. A bore extends through the projection from a free, remote face to the component interior. The bore can be straight walled and if desired can be fitted at its remote end with appropriate fittings to permit external devices or internals to interact with the elements within said component body.Type: GrantFiled: August 4, 1989Date of Patent: August 7, 1990Assignee: Amerace CorporationInventors: Alan D. Borgstrom, David R. Stevens
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Patent number: 4791062Abstract: Novel vaccines for feline viral rhinotracheitis are prepared by psoralen inactivation of live Feline Herpesvirus I by exposure to ultraviolet radiation in the presence of an inactivating furocoumarin. The resulting inactivated viruses are suitable as the immunogenic substances in vaccines, which vaccines are useful for inoculation of hosts susceptible to feline virus rhinotracheitis.Type: GrantFiled: July 6, 1987Date of Patent: December 13, 1988Assignee: Diamond Scientific Co.Inventors: Gary P. Wiesehahn, Richard E. Giles, David R. Stevens
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Patent number: 4693981Abstract: Vaccines employing inactivated viruses having improved retention of antigenic characteristics are prepared by psoralen-inactivation of the live virus in a non-oxidizing atmosphere. By excluding oxygen and other oxidizing species from the inactivation medium, degradation of the antigen characteristics resulting from irradiation with ultraviolet light is largely prevented. The resulting inactivated viruses are employed in vaccine preparations for the inoculation of susceptible hosts to inhibit viral infection.Type: GrantFiled: October 7, 1985Date of Patent: September 15, 1987Assignee: Advanced Genetics Research InstituteInventors: Gary P. Wiesehahn, Richard P. Creagan, David R. Stevens, Richard Giles
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Patent number: 4556556Abstract: Novel vaccines for vesicular stomatitis virus are prepared by psoralen inactivation of the live virus under mild conditions in an inert atmosphere. The resulting inactivated virus can be used as a vaccine for inoculation of susceptible hosts to inhibit VSV infection.Type: GrantFiled: March 23, 1984Date of Patent: December 3, 1985Assignee: Advanced Genetics Research InstituteInventors: Gary P. Wiesehahn, Richard E. Giles, David R. Stevens
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Patent number: 4545987Abstract: Novel vaccines of double-stranded RNA viruses are prepared by psoralen inactivation under mild conditions in an inert atmosphere, optionally in the presence of a mild singlet oxygen scavenger. The resulting inactivated virus can be used as a vaccine for inoculation of hosts to provide for the stimulation of the immune system to the virus.Type: GrantFiled: December 20, 1983Date of Patent: October 8, 1985Assignee: Advanced Genetics Research InstituteInventors: Richard E. Giles, David R. Stevens, Gary P. Wiesehahn
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High voltage shielded cable termination, splice connection, and method of making a splice connection
Patent number: 4006288Abstract: A connector construction having component parts adapted to be assembled in the field at the termini of a pair of high voltage shielded electrical cables includes a pair of sleeves of elastomeric material adapted to be secured over the insulating jacket on each of the cable ends, connector means for joining the conductive cores of the cables, a housing adapted to overlie the sleeves and the connector means and defining an interior chamber surrounding the connector means, and a pair of retaining members adapted to be directly affixed to each of the conductive cores respectively, in an abutting relation to the terminus of a corresponding sleeve and cable insulating jacket for precluding axial movement of the sleeve toward the cable termini.Type: GrantFiled: December 5, 1975Date of Patent: February 1, 1977Assignee: Amerace CorporationInventor: David R. Stevens