IT988667B -
AUTOMATIC SYSTEM FOR THE CLOSING AND OPENING OF DOORS PROGRAMMED FOR INTERVENTION IN THE EVENT OF FIRE
- Google Patents
AUTOMATIC SYSTEM FOR THE CLOSING AND OPENING OF DOORS PROGRAMMED FOR INTERVENTION IN THE EVENT OF FIRE
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Publication number
IT988667B
IT988667BIT2447473AIT2447473AIT988667BIT 988667 BIT988667 BIT 988667BIT 2447473 AIT2447473 AIT 2447473AIT 2447473 AIT2447473 AIT 2447473AIT 988667 BIT988667 BIT 988667B
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Priority claimed from US256120Aexternal-prioritypatent/US3890293A/en
Application filed by Won Door CorpfiledCriticalWon Door Corp
Application grantedgrantedCritical
Publication of IT988667BpublicationCriticalpatent/IT988667B/en