CN206155779U - 一种四旋翼飞行器起落架收放机构 - Google Patents
一种四旋翼飞行器起落架收放机构 Download PDFInfo
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- CN206155779U CN206155779U CN201621085881.2U CN201621085881U CN206155779U CN 206155779 U CN206155779 U CN 206155779U CN 201621085881 U CN201621085881 U CN 201621085881U CN 206155779 U CN206155779 U CN 206155779U
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CN110789714A (zh) * | 2019-10-23 | 2020-02-14 | 军事科学院军事医学研究院环境医学与作业医学研究所 | 基于无人机的全天候水质监测加密控制系统 |
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CN110789714A (zh) * | 2019-10-23 | 2020-02-14 | 军事科学院军事医学研究院环境医学与作业医学研究所 | 基于无人机的全天候水质监测加密控制系统 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of utility model: A four rotor aircraft landing gear retraction mechanism Effective date of registration: 20200820 Granted publication date: 20170510 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING HANGJING INNOVATION SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2020990001003 |
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Date of cancellation: 20210824 Granted publication date: 20170510 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING HANGJING INNOVATION SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2020990001003 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Landing gear retracting and retracting mechanism of four rotor aircraft Effective date of registration: 20210924 Granted publication date: 20170510 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING HANGJING INNOVATION SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2021990000876 |
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Date of cancellation: 20230105 Granted publication date: 20170510 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING HANGJING INNOVATION SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2021990000876 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A four-rotor aircraft landing gear retraction mechanism Effective date of registration: 20230214 Granted publication date: 20170510 Pledgee: Beijing Yanhong Financing Guarantee Co.,Ltd. Pledgor: BEIJING HANGJING INNOVATION SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2023110000065 |