1
Xiang Wang, Hun H Sun: Apparatus and method for measuring cardiac output. Drexel University, William H Eilberg, June 13, 1995: US05423326 (158 worldwide citation)

The present invention reliably computes cardiac output with a noninvasive procedure. The system measures the electrical impedance of a patient's body, during a time interval of interest. The system then obtains frequency transforms of various time segments of the first derivative of the impedance si ...


2
Herczfeld Bonita Falkner, Herczfeld Peter R, Klafter Richard D: Heart rate and respiratory monitor. Drexel University, December 5, 1972: US3704706 (153 worldwide citation)

Apparatus for detection of pulse repetition rate and oxygenation of blood flow, comprising a solid state probe having a narrow bandwidth light source housed to direct light upon a patient's finger and a photodetector housed for receiving reflected light from such finger, the output of the detector b ...


3
Robert M Koerner, Arthur E Lord Jr, John E Brugger: Method of removing contaminants from contaminated soil in situ. Drexel University, Panitch Schwarze Jacobs and Nadel, June 27, 1989: US04842448 (135 worldwide citation)

A method of removing contaminants from a contaminated soil area in situ comprises the steps of placing a barrier in engagement with the exposed surface of the contaminated soil area, sealing the barrier around the periphery of the contaminated soil area and reducing the pressure beneath the outer la ...


4
Xiang Wang, Hun H Sun: System and method of impedance cardiography and heartbeat determination. Drexel University, Panitch Schwarze Jacobs & Nadel, May 10, 1994: US05309917 (132 worldwide citation)

Cardiac monitoring is disclosed in which thoracic impedance and EKG signals are gathered and processed for improved resolution and accuracy. EKG signals are adaptively processed by digitizing, filtering, differentiating and raising the resultant differential by a power greater than one to emphasize ...


5
Ihab Kamel, David B Soll: Biocompatible, surface modified materials and method of making the same. Drexel University, Ophthalmic Research Corporation, Panitch Schwarze Jacobs & Nadel, July 5, 1994: US05326584 (129 worldwide citation)

The present invention includes methods of permanently modifying the surface of a substrate material so as to develop a microscopically smooth, biocompatible surface thereon. A portion of the substrate surface is first removed, as by etching, in a radio frequency plasma reactor using inert argon gas. ...


6
Paul Walinsky, Peter A Lewin, John M Reid: Intravascular, ultrasonic imaging catheters and methods for making same. Thomas Jefferson University, Drexel University, Woodcock Washburn Kurtz Mackiewicz & Norris, August 31, 1993: US05240004 (121 worldwide citation)

Novel intravascular, ultrasonic imaging catheters are provided which utilize thin layers of a flexible plastic material, such as PVDF, which can be spot polarized in active regions which are to serve as piezoelectric transducers. Thin layer metallic electrodes are deposited on opposing surfaces of t ...


7
Ihab Kamel, David B Soll: Method of making biocompatible, surface modified materials. Drexel University, Ophthalmic Research Corporation, Panitch Schwarze Jacobs & Nadel, January 14, 1992: US05080924 (105 worldwide citation)

A method of permanently modifying the surface of a substrate material so as to develop a microscopically smooth, biocompatible surface thereon comprises covalently grafting at least a first biocompatible material, preferably having pendant terminal carboxylic acid or amine groups, to the surface of ...


8
Yen Wei, Danliang Jin, Tianzhong Ding, Jigeng Xu: Mesoporous materials and methods of making the same. Drexel University, Akin Gump Strauss Hauer & Feld L, February 24, 2004: US06696258 (97 worldwide citation)

Mesoporous materials and a method for making such materials is disclosed in which the mesoporous materials are made by forming an aqueous solution having an organometallic compound; adding a solution comprising a pore forming material selected from the group consisting of monomeric polyols, polyacid ...


9
Xuesong Zhou, Afshin S Daryoush: Self-oscillating mixer circuits and methods therefor. Drexel University, Plevy & Associates, November 7, 1995: US05465418 (91 worldwide citation)

Self-oscillating mixer circuits for use in communications systems. The circuits comprise a push-pull amplifier for amplifying a signal having a first frequency to produce an amplified signal, a feedback loop coupled to the push-pull amplifier for phase shifting the amplified signal during each half ...


10
Margaret A Wheatley, Shen Peng, Shruti Singhal, Barry B Goldberg: Surfactant-stabilized microbubble mixtures, process for preparing and methods of using the same. Drexel University, Panitch Schwarze Jacobs & Nadel, October 4, 1994: US05352436 (88 worldwide citation)

The present invention is a mixture including a solvent, a first surfactant and a second, dispersible surfactant different from the first surfactant, the mixture having stabilized gas microbubbles formed therein by sonication. The gas microbubbles are useful in ultrasonic diagnostics. Preferably the ...