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1999-09-11
Modification of safety door railing
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2000-02-28
Swichboard for elevator cabin
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1996-05-01
Safety devices for doors
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1997-10-01
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1996-07-20
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1998-01-21
Safety devices for doors
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1997-08-21
Auxiliary escape equipment for elevator
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1998-12-01
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1998-05-22
Safety device for elevator door
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1998-12-11
Improvement for protection structure of steel rope for elevator
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2001-06-06
Descending safety devices for emergency escape from buildings
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1997-08-21
Improved structure of emergency escape ladder
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1997-05-06
Safety device of an elevator
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1999-05-11
Safety fastener for fixing escape rope from high building
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1997-08-21
Emergency escape device for high-rise buildings
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1997-08-11
Improved structure of escape rope component
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1997-11-01
Automatic rolling device of electric rolling door for emergency escape
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1997-12-11
An apparatus for escape safety window structure
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2001-05-20
Door for lifts and elevators
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1997-11-21
Improved structure of escape rope for tall building
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1997-01-11
Safety rail capable of accommodating escaping ladder
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1998-07-29
Safety isolating transformer
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2000-05-21
Automatic slowly descending ladder for blaze emergency escape also as electric elevator
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1999-02-11
Improved structure for elevator of person & cargo
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1994-06-22
Emergency escape ladder