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Victor Richards

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Audio apparatus

Undertaking
Patent

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Interactive audio-visual apparatus

Optics: image projectors – Stereoscopic – Slide transfer mechanism
Patent

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Single speed frictional drive unit with magnetic biasing means

Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent

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Sound track unit for audio-visual apparatus

Undertaking
Patent

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Stereoscopic viewer

Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent

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Profile ID: LFUS-PAI-P-490643

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