1
Manfred Pfeiler, Konrad Mund, Walter Preidel, Goesta Sjoeholm: System for infusion of medicine into the body of a patient. Siemens Aktiengesellschaft, Hill Steadman & Simpson, September 24, 1996: US05558640 (340 worldwide citation)

A system for infusing medicine into the body of a patient includes an implantable infusion apparatus containing a dosing unit with a reservoir for the medicine and a medicine delivery pump for pumping doses of the medicine from the reservoir into the patient. The infusion apparatus also includes a s ...


2
Walter Preidel, Sebastian Proels: Electrocatalytic glucose sensor. Siemens Aktiengesellschaft, Kenyon & Kenyon, January 6, 1998: US05704354 (214 worldwide citation)

An electrocatalytic sensor in catheter type of construction for determining glucose in body fluids, especially in the blood, having the following features:


3
Walter Preidel, Konrad Mund: Method for determining the concentration of electro-chemically convertible substances. Siemens Aktiengesellschaft, Mark H Jay, April 24, 1990: US04919770 (165 worldwide citation)

The invention involves a method for determining the concentration of electro-chemically convertible substances in a solution by means of an analyzer equipped with a test electrode, so that a precise determination of the concentration, dependable over extended periods, is possible. The invention prov ...


4
Walter Preidel: Electrochemical-enzymatic sensor. Siemens Aktiengesellschaft, Kenyon & Kenyon, May 5, 1998: US05746898 (160 worldwide citation)

An electrochemical-enzymatic sensor for the determination of substances, in particular glucose, in body fluids, which possesses a good long-term stability, includes: a sensor electrode of electrocatalytically inactive carbon, a counterelectrode, a reference electrode, an enzyme-containing layer loca ...


5
Walter Preidel: Silver-chloride reference electrode. Siemens Aktiengesellschaft, Kenyon & Kenyon, July 27, 1993: US05230786 (44 worldwide citation)

In the case of a reference electrode with a layer of silver chloride situated on a silver layer, the amount of silver ordinarily released while in use can be significantly reduced by providing the silver-chloride layer with a layer of water absorbing, ionically conductive material which projects out ...


6
Walter Gumbrecht, Wolfgang Schelter, Roland Hofmann Tikkanen, Walter Preidel: Apparatus for the electrochemical determination of the partial oxygen pressure in a liquid measuring medium. Siemens Aktiengesellschaft, Hill Steadman & Simpson, July 6, 1993: US05225063 (34 worldwide citation)

An apparatus for electrochemically determining the partial oxygen pressure pO.sub.2 in a liquid measuring medium includes a measuring sensor having a working electrode and a counter-electrode. The electrodes are manufactured in thin-film technology and are arranged on a substrate in a measuring chan ...


7
Walter Preidel: Apparatus and method for the electrochemical determination of the oxygen concentration of a liquid medium. Pacesetter, Hill Steadman & Simpson, October 8, 1996: US05562815 (15 worldwide citation)

An apparatus and method of electrochemically determining an oxygen concentration with an oxygen sensor that includes a working electrode. The working electrode has a potential profile that includes a first potential step (a first measuring potential), a second potential step (a second measuring pote ...


8
Konrad Mund, Walter Preidel, J Raghavendra Rao, Gerhard Richter: Method and apparatus for the electrochemical determination of oxygen concentration. Siemens Aktiengesellschaft, Kenyon & Kenyon, August 1, 1989: US04853091 (14 worldwide citation)

The electrochemical determination of the oxygen concentration, particularly in biological matter, is possible by means of an oxygen sensor with a measuring electrode and a counter electrode over long periods of time, even if the sensor is implanted, by taking the following measures; two potentials a ...


9
Walter Preidel, Herbert Grossmann: Method of making the electrode. Siemens Aktiengesellschaft, Kenyon & Kenyon, September 15, 1992: US05147590 (9 worldwide citation)

An electrode for medical applications can be manufactured with different geometries, and particularly in the form of hollow bodies, by depositing pyrographite on a shaped body of glassy carbon. The deposition is achieved by means of the pyrolysis of hydrocarbons at temperatures ranging approximately ...


10
Walter Preidel: Electrochemical determination of oxygen concentration. Siemens Aktiengesellschaft, Kenyon & Kenyon, December 27, 1994: US05376244 (5 worldwide citation)

In a process for electrochemically determining the oxygen concentration, in particular in body fluids, by means of an oxygen sensor having a sensor electrode, an exact oxygen determination is possible if a potential profile having a plurality of potential stages is impressed on the sensor electrode, ...



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