CN216184095U - 一种吸尘黑板擦 - Google Patents
一种吸尘黑板擦 Download PDFInfo
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- CN216184095U CN216184095U CN202121064329.6U CN202121064329U CN216184095U CN 216184095 U CN216184095 U CN 216184095U CN 202121064329 U CN202121064329 U CN 202121064329U CN 216184095 U CN216184095 U CN 216184095U
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- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 12
- 230000036541 health Effects 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 5
- 230000005686 electrostatic field Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 2
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CN202121064329.6U CN216184095U (zh) | 2021-05-18 | 2021-05-18 | 一种吸尘黑板擦 |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
EE01 | Entry into force of recordation of patent licensing contract |
Assignee: MARINE RESOURCES DEVELOPMENT INSTITUTE OF JIANGSU (LIANYUNGANG) Assignor: Jiangsu Ocean University Contract record no.: X2023980048267 Denomination of utility model: A type of vacuum blackboard eraser Granted publication date: 20220405 License type: Common License Record date: 20231128 |
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EE01 | Entry into force of recordation of patent licensing contract | ||
EC01 | Cancellation of recordation of patent licensing contract |
Assignee: MARINE RESOURCES DEVELOPMENT INSTITUTE OF JIANGSU (LIANYUNGANG) Assignor: Jiangsu Ocean University Contract record no.: X2023980048267 Date of cancellation: 20240726 |