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(en )
2000-06-01
Adjustable armrest of office chair
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2001-03-01
Adjustment structure for armrest of chair
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2001-08-21
Structure for adjusting backrest of chair
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2001-05-01
Improved adjustment structure for armrest of seat
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2001-07-01
Adjustment structure for seat of chair
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2001-11-11
Structure for adjustment of chair
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2002-08-21
Improved adjustment structure of chair
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2002-02-11
Simple adjustment structure for armrest of office chair
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2001-03-01
Structure of backrest adjustment for chair
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2001-10-01
Structure of armrest seat
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2002-08-21
Improved structure of armrest for chair
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2002-09-01
Improved sliding structure for armrest of chair
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2004-01-21
Improved structure of armrest for office chair
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2004-01-01
Improved structure of backrest of chair
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2002-05-21
Improved structure of armrest for large chair
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2001-08-21
Structure for adjusting lifting of armrest of chair
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2001-05-01
Improved structure of adjustable backrest of chair
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2001-08-01
Structure for adjusting the height of armrest of chair
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2004-01-01
Improved adjustment device for armrest of chair
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2003-03-11
Improved structure of height adjustment for armrest of chair
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2001-11-01
Structure of armrest frame set for office chair
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2003-12-01
Structure of backrest of chair
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2001-12-11
Adjustment structure for back of foldable chair
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2001-03-01
Structure of stationary seat for adjustable chair
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2000-02-21
Structure of armrest for chairs