Howard C Welborn Jr: Supported polymerization catalyst. Exxon Chemical Patents, M B Kurtzman, February 28, 1989: US04808561 (459 worldwide citation)

An olefin polymerization supported catalyst comprising a support and the reaction product of a metallocene of Group 4b, 5b or 6b of the Periodic Table and an alumoxane, said reaction product formed in the presence of a support.

Lowell D Harris, Charles R Smith: Interactive system and related method for displaying data to produce a three-dimensional image of an object. Kabushiki Kaisha Toshiba, Finnegan Henderson Farabow Garrett & Dunner, February 28, 1989: US04809065 (333 worldwide citation)

A system for displaying data to produce a three-dimensional image, and interactively modifying and transforming the data and the resultant image in response to user commands comprises control circuitry, a high-speed processor linked to the control circuitry, a memory linked to the control circuitry ...

Douglas B McGirr: Stone extractor and method. Flehr Hohbach Test Albritton & Herbert, February 28, 1989: US04807626 (300 worldwide citation)

Extractor and method for removing stones or other foreign objects from the biliary and urinary systems or from other portions of the body. The extractor includes a self-closing basket at the distal end of a catheter, with a flexible control line for opening the basket from the proximal end of the ca ...

David B Leblang, Gordon McLean Jr, Howard Spilke, Robert P Chase Jr: Computer device for aiding in the development of software system. Apollo Computer, Hamilton Brook Smith & Reynolds, February 28, 1989: US04809170 (296 worldwide citation)

A support system for Computer-Aided Software Engineer (CASE) applications provides configuration management and features such as transparent retrieval of named versions of program sequences on a line by line basis as well as task monitoring and reporting. A modification record is maintained for all ...

Mohammed I Aziz, Ted L Blaney: Disposable absorbent article having elasticized flaps provided with leakage resistant portions. The Proctor & Gamble Company, Steven W Miller, John M Pollaro, Fredrick H Braun, February 28, 1989: US04808178 (292 worldwide citation)

An article of manufacture is disclosed for absorbing liquids, particularly body fluids such as urine. An absorbent core is encased in an outer covering layer to which flaps are connected along the longitudinal sides. The flaps are elasticized and have a leakage resistant portion which is non-wicking ...

Roger W Pryor, Napoleon P Formigoni, Stanford R Ovshinsky: Thin film overvoltage protection devices. Energy Conversion Devices, Marvin S Siskind, Richard M Goldman, February 28, 1989: US04809044 (235 worldwide citation)

Solid-state overvoltage protection devices, preferably formed of deposited thin film, chalcogenide, threshold switching materials, typically include at least one elongated current conduction path through an elongated cross-sectional area of the threshold switching material. The cross-sectional area ...

Dean L Kamen: Pressure-measurement flow control system. Bromberg Sunstein & Casselman, February 28, 1989: US04808161 (222 worldwide citation)

A system is provided for controlling flow of a first fluid through a line. Dispensing means isolates a region of the first fluid in the line from effects of pressure in the line outside of the region and repetitively dispenses into and out of the region volume increments of first fluid. Measurement ...

Lawrence T Hersh, Richard Medero, Rush W Hood Jr: Pulse oximetry system. Critikon, February 28, 1989: US04807631 (213 worldwide citation)

A pulse oximetry system is provided in which LEDs of two different wavelengths illuminate tissue containing arterial blood flow. A photodiode receives light from the LEDs and produces electrical signals containing pulsatile components. The components of the two wavelengths are separated and the puls ...

Sanford J Morganstein, Bakulesh A Mehta, Herbert B Krakau, Neil F N Milsted, Mark D Klecka: Busy/no-answer call completion equipment. Dytel Corporation, Jerry W Mills, Roger N Chauza, February 28, 1989: US04809321 (212 worldwide citation)

Call completion equipment (10) is disclosed for use with a switching system (14) for assisting callers to complete telephone calls thereto. If a primary destination telephone set (16) is busy or does not answer, a message is transmitted from a message storage unit (54) to the calling party. The mess ...

Gary K Baird: Three magnet casing collar locator. Halliburton Company, William J Beard, February 28, 1989: US04808925 (211 worldwide citation)

For use with casing having flush joint collars, a detection system is set forth which comprises a tool body made of nonmagnetic material and enclosing abutted first, second and third permanent magnets. The magnets are axially aligned, abutted so that opposing poles are in contact with one another, t ...

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