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GB157377A
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A diaphragm valve for protective masks
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DE359999C
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Spinning regulator for the promotion of viscose in the production of rayon
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DE340371C
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Hood for the hygienic treatment of scalp hair
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DE336677C
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Pump box for the production of vacuum vessels
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DE362654C
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Double-walled vacuum vessel made of glass or porcelain
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DE362653C
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Process for the production of double-walled vacuum vessels with internal copper mirroring
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DE351103C
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Plastic mass
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DE332770C
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Process for the production of the mirror covering of vacuum vessels
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DE365349C
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Process for the separation of cerium on the one hand and didymium, lanthanum and ytter earth on the other
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DE340457C
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Process for cleaning the raw sulphates of the cerite earth
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DE382646C
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Method of weighing silk
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DE376613C
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Artificial skin
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DE322836C
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Method and device for treating natural or artificial silk with gases or steam
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DE390903C
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Half mask made of soft fabric to keep out harmful gases
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DE382606C
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Method of weighing silk
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DE354534C
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Method and device for the renewal of breathing air
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DE373771C
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Method of weighing silk
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DE339244C
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Cartridge for self-contained breathing apparatus with exchange masses consisting of super oxides
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DE336695C
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Process for the manufacture of leather gas masks
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DE334174C
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Collapsible gas mask made of gas-impermeable material
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