4. Geometrical instruments

Martin Hamacher

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Electrical device for use in an explosive environment

Electricity: conductors and insulators – With fluids or vacuum – With fluid-condition responsive and/or indicating means
Patent

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Illuminating device for underground mining

Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled
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Junction piece for electrical leads

Geometrical instruments
Patent

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Lamp for use in subterranean applications

Illumination – Plural light sources – Diverse light generators
Patent

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Lighting structure

Buckles – buttons – clasps – etc.
Patent

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Profile ID: LFUS-PAI-P-214520

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