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Dr. Eduard Fresenius Chemisch-pharmazeutische Industrie Kg.

Gunter Helmut Marx

A hearing aid includes an electronic amplifier, an electric power source and a switch for automatically breaking or making the connection between the amplifier and the power source depending on whether the hearing aid is in use or out of use. The switch is provided in such a manner so as to be responsive to switching criterion defined by a change of state such as change in temperature, moisture etc. The switch is disposed at a wall surface which is subjected to the change of state.

Hearing aid which cuts on/off during removal and attachment to the user

In a method and means (cooling pack) for cooling injured parts or areas of a human or animal body, xylite (C.sub.5 H.sub.12 O.sub.5) is used as the cold means. The xylite is dissolved in crystalline form in an aqueous or non-aqueous fluid and brought into direct or indirect contact with the part or area of the body to be cooled. The xylite may preferably be accommodated in a flexible container to which the solvent fluid can be supplied directly or from a container joined thereto.

Method and means for cooling injured parts or areas of a human or animal

A blood filter for removing dead blood corpuscles, conglomerations of blood corpuscles and foreign components from the blood comprises dense wadding formed from a plastics monofilament or a bundle of long plastics threads.

Blood filter

A blood filter for removing dead blood corpuscles, conglomerations of blood orpuscles and foreign components from the blood comprises dense wadding formed from a plastics monofilament or a bundle of long plastics threads.

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Grafelfing, Germany

Gunter Helmut Marx