1
Alan Broadwin, Alexander Kreizman, Chana Puiam, Vaclav O Podany, Leonard M Emery: Method and apparatus for ultrasonic surgical fragmentation and removal of tissue. Cooper LaserSonics, Vorys Sater Seymour and Pease, May 9, 1989: US04827911 (558 worldwide citation)

A method and apparatus for periodically interrupting ultrasonic power applied to a ultrasonically vibrating tip to control its amplitude between high and low or zero amplitudes with a selectible duty cycle and repetition rate provides enhanced fragmentation and improves surgical control. The duty cy ...


2
Nigel Seth Smith, Cameron Bates, Samson Lim, William van Rassel, Robert Yoneda, Keith Lucas: Communication of individual messages to subscribers in a subscription television system. Scientific Atlanta, Banner Birch McKie & Beckett, May 9, 1989: US04829569 (364 worldwide citation)

A subscription television system in which individual decoders are enabled to receive individually addressed messages is disclosed. The composite signal, including video and teletext, also comprises addressed packets, which are detected by decoders and which indicate that a message addressed to a par ...


3
Karl W McCalley, Steven D Wilson, James L Fischer: Presentation player. Telaction Corporation, Amster Rothstein & Ebenstein, May 9, 1989: US04829372 (315 worldwide citation)

The present invention relates to a presentation player which is utilized in a digital, interactive communication system accessible to a plurality of subscribers who can select any of a plurality of pre-recorded video/audio presentations for viewing on their television sets. The presentation player i ...


4
Paul I Weiss, Weldon S Guest: Extracorporeal circulation apparatus. David A Rose, May 9, 1989: US04828543 (268 worldwide citation)

A method and apparatus for extracorporeal circulation and treatment of blood. The apparatus comprises means for circulating and for treating blood, with a control system for controlling the circulating means. The circulating means includes tubing that directs blood to and from a microporous membrane ...


5
Sven Olerud: Fixing instrument for use in spinal surgery. Finnegan Henderson Farabow Garrett & Dunner, May 9, 1989: US04827918 (262 worldwide citation)

A fixing instrument intended to adjust and lock in adjusted position vertebrae in relation to each other includes a unit comprising two support members which are mutually connected by means of a screw spindle extending through said support members such that the support members are moved towards each ...


6
Robert V Kenna: Anterior cruciate ligament prosthesis. Pfizer Hospital Products Group, Peter C Richardson, Lawrence C Akers, Elizabeth O Slade, May 9, 1989: US04828562 (259 worldwide citation)

An adjustable housing suitable to be used with another housing and with a synthetic ligament so as to provide (for example) an anterior cruciate ligament prosthesis system for a knee joint is provided. The adjustable housing features an interior having a step shoulder located therein. A set screw in ...


7
Harold J Vinegar, Scott L Wellington: Sample holder. Shell Oil Company, May 9, 1989: US04827761 (252 worldwide citation)

Sample holder apparatus for use in imaging (X-ray CT/NMR) apparatus is provided. The sample holder may be employed to conduct fluid flow studies on a sample and to measure petrophysical properties of a sample. The sample holder may consist of non-ferromagnetic, nonmetallic components; these componen ...


8
Edward W Porter: Voice recognition system. Dragon Systems, Edward W Porter, May 9, 1989: US04829576 (248 worldwide citation)

A text locating system recognizes spoken utterances, uses the recognized words as a search string, and searches text for words matching that search string. The probability that a given vocabulary word is selected as a search word is altered both by limiting the recognizable vocabulary to words in th ...


9
Leslie A Geddes, Charles F Babbs, William D Vorhees III, Joe D Bourland: Demand electroventilator. Purdue Research Foundation, Barnes & Thornburg, May 9, 1989: US04827935 (242 worldwide citation)

A demand electroventilator for monitoring and stimulating the respiration of a patient operates in a manner analogous to the operation of a demand cardiac pacemaker for monitoring and stimultating the heart when needed. The demand electroventilator has a pair of stimulating electrodes for placement ...


10
Richard A Dyer, Michael J Knauer, Berle E Rabenberg, Arthur C Bentley, Richard O Keelor: Electronically controlled exercise system. Powercise International Corporation, Pravel Gambrell Hewitt Kimball & Krieger, May 9, 1989: US04828257 (230 worldwide citation)

A system and method for providing an exercise program at a desired pace throughout each repetition and which applies resistance against a user's efforts based upon user performance history and user demographics. A central controller stores user demographics and performance information, and provides ...