1
John A Main, Mark E Wells, Tony S Keller: Vertebral prosthesis. Vanderbilt University, Tilton Fallon Lungmus, June 12, 1990: US04932975 (598 worldwide citation)

A dynamic prosthetic vertebral body for use in a cavity left by resection of a natural vertebral body and adjacent intervertebral discs. The prosthesis includes a pair of rigid housings joined by a connecting structure that is operable to shift the housings apart into supportive engagement with the ...


2
Otto Frey, Rudolf Koch, Heinrich M F Planck: Joint endoprosthesis. Sulzer Brothers, Kenyon & Kenyon, June 12, 1990: US04932969 (446 worldwide citation)

The joint endoprosthesis is formed of a compressible elastic hollow body which is disposed between two anchoring elements. The hollow body defines a closed cavity which is filled with an incompressible fluid medium. Compressive loadings near the edges of the endoprosthesis cause a displacement of th ...


3
David T Green, Henry Bolanos, Robert J Geiste: Absorbable surgical fastener. United States Surgical Corporation, Thomas R Bremer, Peter G Dilworth, Rocco S Barrese, June 12, 1990: US04932960 (414 worldwide citation)

A bioabsorbable surgical fastener comprising a fastener member and an interlocking retainer member. The retainer member has longitudinally extending slots on the lateral sides of the retainer for allowing transverse expansion of the columnar members into which the prongs of the fastener member are l ...


4
Bruce A Christie, Brian M McMaster, J Warren Blaker: Accommodating intraocular lens. Storz Instrument Company, June 12, 1990: US04932966 (215 worldwide citation)

An accommodating intraocular lens apparatus preferably includes a lens member having a relatively flexible portion and a relatively rigid portion, with a fluid-filled chamber therebetween. The preferred intraocular lens also includes a hydraulic or other fluid accommodation provision for changing th ...


5
Stephen B Kaufman, Shelly Hyland, Michael A Lesczynski, Calvin L Bryant: Interactive patient assistance device. HealthTech Services, June 12, 1990: US04933873 (210 worldwide citation)

An interactive patient assistance device houses both preselected doses of medication and a physical testing device. Both medication and the testing device are normally retained within separate compartments within the device away from access by the patient. The device keeps track of medication and di ...


6
James H Morehouse, Thomas L Andrews Jr, John H Blagaila, David M Furay, Terry G Johnson: Disk drive apparatus using dynamic loading/unloading. Prairietek Corporation, Sheridan Ross & McIntosh, June 12, 1990: US04933785 (198 worldwide citation)

A disk drive apparatus is disclosed for primary use with portable, laptop or other information storage systems. The disk drive apparatus includes one or more about 2.5 inch hard disks. A rotary actuator is utilized and includes an arm assembly having a cam follower member for use in dynamically load ...


7
Arthur F Kuckes: Apparatus for locating an elongated conductive body by electromagnetic measurement while drilling. Vector Magnetics, Jones Tullar & Cooper, June 12, 1990: US04933640 (194 worldwide citation)

A method and apparatus for determining the distance and direction of a well from a borehole. A toroidal inductor surrounds a drill stem within a borehole. The inductor acts as a primary for a transformer, with the drill stem, the earth surrounding the borehole, and electrically conductive material a ...


8
Donald J Humphrey, James P Hughes, Wayne A Peterson, Wayne R Roiger: Network communications adapter with dual interleaved memory banks servicing multiple processors. Network Systems Corporation, Orrin M Haugen, Thomas J Nikolai, Frederick W Niebuhr, June 12, 1990: US04933846 (191 worldwide citation)

A network communications adapter interconnects a plurality of digital computing resources for mutual data exchange in which a high performance, large capacity common memory is provided with a pair of external buses which allows multiple processors to store information in and read information from th ...


9
John M Evans Jr, Carl F R Weiman, Steven J King: Mobile robot navigation employing ceiling light fixtures. Transitions Research Corporation, Perman & Green, June 12, 1990: US04933864 (184 worldwide citation)

Apparatus and method which provides for the determination of a vehicle's orientation and position in an environment, such as a hallway, from an image of ceiling lights. A mobile robot 10 includes a camera 12 that is pitched up obliquely at an intermediate angle between a horizon and a zenith. The ca ...


10
Frederic Heiman, Glenn Spitz: Scanning system with adjustable light output and/or scanning angle. Symbol Technologies, June 12, 1990: US04933538 (174 worldwide citation)

Apparatus for reading bar code symbols including a laser light source, an optical component for scanning a reference plane, and a sensor for detecting the light of variable intensity reflected from the target. A processor determines whether the reflected light represents a spatial variation that cou ...