4. Boots, shoes, and leggings

Frederick Thomson

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Continous real time safety-related control system

Boots – shoes – and leggings
Patent

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Electromechanical relay system

Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
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Light curtain system with system and watchdog microcontrollers

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
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Profile ID: LFUS-PAI-P-1395433

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