Assignee
HANGZHOU ZHONGTAI IND GROUP CO LTD
CN·4 granted patents·1 pending application·12 citations·filing 2013–2019
Top patents by PatentIndex Score
5 records- 0174US9974389B2Adjusting mechanism for adjusting a restoring force acting on the backrest of a chair, and office chair provided with such an adjusting mechanismHANGZHOU ZHONGTAI IND GROUP CO LTD·Filed 2015·Granted May 22, 2018·4 cites·12 claims
- 0268US8939509B2Chair chassisHANGZHOU ZHONGTAI IND GROUP CO LTD·Filed 2013·Granted Jan 27, 2015·6 cites·10 claims
- 0356US11759014B2Multifunctional swivel chair tray and using method thereofHANGZHOU ZHONGTAI IND GROUP CO LTD·Filed 2019·Granted Sep 19, 2023·2 cites·14 claims
- 0436US10631641B2Spiral adjusting swivel chair tray for changing angle of torsion springHANGZHOU ZHONGTAI IND GROUP CO LTD·Filed 2018·Granted Apr 28, 2020·0 cites·8 claims
- 0529US2019343287A1Slider-crank mechanism adjustment type swivel chair trayHANGZHOU ZHONGTAI IND GROUP CO LTD·Filed 2018·Application pending·0 cites
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