CN111444258A - Medical data sharing method based on block chain - Google Patents
Medical data sharing method based on block chain Download PDFInfo
- Publication number
- CN111444258A CN111444258A CN202010085845.0A CN202010085845A CN111444258A CN 111444258 A CN111444258 A CN 111444258A CN 202010085845 A CN202010085845 A CN 202010085845A CN 111444258 A CN111444258 A CN 111444258A
- Authority
- CN
- China
- Prior art keywords
- data
- user
- medical
- node
- request
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2458—Special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
- G06F16/2471—Distributed queries
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Signal Processing (AREA)
- General Health & Medical Sciences (AREA)
- Bioethics (AREA)
- Computing Systems (AREA)
- Health & Medical Sciences (AREA)
- Data Mining & Analysis (AREA)
- Electromagnetism (AREA)
- Medical Informatics (AREA)
- Power Engineering (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Probability & Statistics with Applications (AREA)
- Computational Linguistics (AREA)
- Medical Treatment And Welfare Office Work (AREA)
- Storage Device Security (AREA)
Abstract
The invention provides a medical data sharing method based on a block chain, which comprises the following steps: s1: a node registers a public key on the network, wherein the node is a node in a alliance group, and the public key is a 32-bit identifier; s2: the organization encrypts the data through the public key and uploads the data to the database; s3: the client sends a request to the host node, broadcasts the request after receiving the request and achieves consensus; s4: uploading data to a blockchain database; s5: forming a block chain for the blocks, interacting with the nodes by using an interface provided by the web, and encrypting a private key of a user by using a password; s6: when the user inquires data, the user can upload the data and also inquire the data by adopting an identity authentication mode. The data sharing method based on the block chain is decentralized, traceable and tamper-proof, and can share data and guarantee the safety of the data.
Description
Technical Field
The invention belongs to the technical field of block chains, and particularly relates to a medical data sharing method based on a block chain.
Background
Medical data is becoming especially important as people are more and more concerned about health, and more new technologies such as remote access, electronic storage and the like are applied to medical data at present. There are many problems to be solved in the medical field. The first problem is the storage problem of medical data, which is the personal privacy of patients, but at present, many medical data are stored on a third-party server, and if the third-party server is attacked, the data on the server can be leaked. The second problem is data sharing, if patients, researchers and medical organizations can share data, the data can be guaranteed to be safe and not divulged, doctors can be helped to make treatment schemes according to the illness states of the patients, and data sources are provided for the researchers to research the medicine and the diseases. At present, a cloud server is mainly adopted to store data, and medical institutions store electronic information and data of patients in the cloud, so that although the efficiency of retrieval and shared query is improved, the risk of privacy disclosure is brought, institutions owning the data directly control the data, the risk of data tampering exists, and who can query and use the data is also a problem.
Many researchers begin to research medical health data systems, and some people propose a distributed electronic health system model and some people propose a medical service model in the cloud, but the distributed electronic health system model and the medical service model in the cloud cannot guarantee the safety of data.
Disclosure of Invention
The invention aims to provide a medical data sharing method based on a block chain, and the data sharing method based on the decentralized, traceable and tamper-proof block chain can share data and simultaneously ensure the safety of the data.
The invention provides the following technical scheme:
a medical data sharing method based on a block chain comprises the following steps:
s1: a node registers a public key on the network, wherein the node is a node in a alliance group, and the public key is a 32-bit identifier;
s2: the organization encrypts the data through the public key and uploads the data to the database;
s3: the client sends a request to the host node, broadcasts the request after receiving the request and achieves consensus;
s4: uploading data to a blockchain database;
s5: forming a block chain for the blocks, interacting with the nodes by using an interface provided by the web, and encrypting a private key of a user by using a password;
s6: when the user inquires data, the user can upload the data and also inquire the data by adopting an identity authentication mode.
Preferably, the medical health data model is established by a medical data sharing method, and the medical health data model includes: a storage service that stores a plurality of medical data; inquiring service, wherein a user inquires medical data through a node alliance of a hospital; and the uploading service is used for encrypting data and uploading the data when a user requests, storing medical data when a hospital requests, and inquiring the medical data and other information of the user in other hospitals when the user goes to other hospitals.
Preferably, a Hash algorithm is added in the model, the uploaded data is hashed, a digest value is generated and then stored in a block, and the digest and the Hash of the original text are compared, so that the authenticity of the data can be verified, and the retrieval can be also carried out through query.
Preferably, in the medical health data model, the user can implement data sharing and guarantee the privacy of the user data by access control and self-defining a control strategy, wherein the access control comprises the following steps:
s11: generating parameters KP and KM, applying for registration by a user, and sending identity information and attributes to an authentication center;
s12: if the verification is correct, the authentication center CA issues a private key to the user, the flow is terminated through a quantum key distribution mode if the verification fails, and after the block chain is registered, the authority for accessing the data only comprises the user and a user authority agent;
s13: a user formulates an access control strategy according to own requirements, encrypts data and uploads the encrypted data;
s14: the identity of the user who needs to access the data is verified, then the user puts forward an access request, the access time and the access duration of the data accessing person can be set, the access purpose of the data accessing person can be verified, and if the access request does not meet the requirement, the access request is rejected.
The invention has the beneficial effects that: in order to protect the privacy of medical health data during storage and sharing, the invention provides a decentralized, traceable and tamper-proof data sharing method, introduces a Byzantine fault-tolerant system consensus mechanism, solves the privacy protection problem of the medical data, reduces the turnaround time of data sharing, and improves the efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a data security model of the blockchain of the present invention;
FIG. 2 is a block chain structure diagram of the data of the present invention;
fig. 3 is a flow chart of access control of the present invention.
Detailed Description
The medical health system is used as an information carrier of medical health data, so that the efficiency and accuracy of medical health service can be improved, the possibility of misdiagnosis or treatment delay is reduced, and the service level of medical institutions can be improved. Medical health data is a valuable data asset, and is analyzed and recorded, so that the health management and planning level is improved for individuals. But the secure storage and sharing of medical health data requires great attention. Therefore, how to implement the sharing of medical data on the basis of ensuring data security is a concern of many researchers. Aiming at various problems, the invention designs a block chain-based medical health data security model, which helps to solve the problems that medical health data is easy to monopolize, falsified, difficult to share, and a third party is not credible, and the like, so as to really achieve the purposes of distributed, center-removing, traceable and unchangeable medical health data security sharing and storage.
As shown in fig. 1, the medical health data model provides three services:
service one: a storage service that can store a lot of medical data;
service two: the inquiry service is realized, and the user can inquire the medical data through the node alliance of the hospital;
service three: the uploading service enables a user to request to encrypt data and upload the data, a hospital can request to store medical data, and if the user goes to other hospitals, the user can inquire information such as medical data of the user in other hospitals.
The hash value of the digest of the data, the public key of the data uploader, and the upload time are collectively referred to as a TX.
A Hash algorithm is added in the model, the uploaded data are subjected to Hash, and the generated abstract value is stored in a block, so that the abstract and the Hash of the original text can be compared, the authenticity of the data can be verified, and the retrieval can be also carried out through query.
As shown in fig. 2, a byzantine fault-tolerant system consensus mechanism is adopted to solve the privacy protection problem of medical data. All the institutions are ranked here and the top 100 institutions are selected as the high-level league group. The selection range of the main nodes is a high-level alliance group, the first-ranked mechanism is the main node, and the steps are as follows:
the method comprises the following steps: a node registers a public key on the network, wherein the node is a node in a alliance group, and the public key is a 32-bit identifier;
step two: the organization encrypts the data through the public key and uploads the data to the database;
step three: the client sends a request to the host node, broadcasts the request after receiving the request and achieves consensus;
step four: uploading data to a blockchain database;
step five: forming a block chain for the blocks, interacting with the nodes by using an interface provided by the web, and encrypting a private key of a user by using a password;
step six: when the user inquires data, the user can upload the data and also inquire the data by adopting an identity authentication mode.
As shown in fig. 3, in the medical data sharing model based on the blockchain, a user can implement data sharing by access control and customizing a control policy, so as to ensure privacy of user data, because medical data of a patient is easily stolen, a doctor can also check data of the patient under the condition that the patient does not agree with the medical data, the patient does not know data condition of the patient, and does not know who uses the medical data of the patient, and by access control, privacy of the patient can be ensured, and the data of the patient can be used more valuably. The steps of access control are as follows:
the method comprises the following steps: generating parameters KP and KM, applying for registration by a user, and sending identity information and attributes to an authentication center;
step two: if the verification is correct, the authentication center CA issues a private key to the user, the flow is terminated through a quantum key distribution mode if the verification fails, and after the block chain is registered, the authority for accessing the data only comprises the user and a user authority agent;
step three: a user formulates an access control strategy according to own requirements, encrypts data and uploads the encrypted data;
step four: the identity of the user who needs to access the data is verified, then the user puts forward an access request, the access time and the access duration of the data accessing person can be set, the access purpose of the data accessing person can be verified, and if the access request does not meet the requirement, the access request is rejected.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A medical data sharing method based on a block chain is characterized by comprising the following steps:
s1: a node registers a public key on the network, wherein the node is a node in a alliance group, and the public key is a 32-bit identifier;
s2: the organization encrypts the data through the public key and uploads the data to the database;
s3: the client sends a request to the host node, broadcasts the request after receiving the request and achieves consensus;
s4: uploading data to a blockchain database;
s5: forming a block chain for the blocks, interacting with the nodes by using an interface provided by the web, and encrypting a private key of a user by using a password;
s6: when the user inquires data, the user can upload the data and also inquire the data by adopting an identity authentication mode.
2. The blockchain-based medical data sharing method according to claim 1, wherein a medical health data model is established by the medical data sharing method, and the medical health data model comprises: a storage service that stores a plurality of medical data; inquiring service, wherein a user inquires medical data through a node alliance of a hospital; and the uploading service is used for encrypting data and uploading the data when a user requests, storing medical data when a hospital requests, and inquiring the medical data and other information of the user in other hospitals when the user goes to other hospitals.
3. The method as claimed in claim 1, wherein a Hash algorithm is added to the model, the uploaded data is hashed, a digest value is generated and stored in the block, and the digest and the Hash of the original text are compared to verify the authenticity of the data.
4. The method for sharing medical data based on blockchain according to claim 1, wherein in the medical health data model, a user can implement data sharing by means of access control and customized control strategy, so as to ensure privacy of user data, and the access control includes the following steps:
s11: generating parameters KP and KM, applying for registration by a user, and sending identity information and attributes to an authentication center;
s12: if the verification is correct, the authentication center CA issues a private key to the user, the flow is terminated through a quantum key distribution mode if the verification fails, and after the block chain is registered, the authority for accessing the data only comprises the user and a user authority agent;
s13: a user formulates an access control strategy according to own requirements, encrypts data and uploads the encrypted data;
s14: the identity of the user who needs to access the data is verified, then the user puts forward an access request, the access time and the access duration of the data accessing person can be set, the access purpose of the data accessing person can be verified, and if the access request does not meet the requirement, the access request is rejected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085845.0A CN111444258A (en) | 2020-02-11 | 2020-02-11 | Medical data sharing method based on block chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010085845.0A CN111444258A (en) | 2020-02-11 | 2020-02-11 | Medical data sharing method based on block chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111444258A true CN111444258A (en) | 2020-07-24 |
Family
ID=71627107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010085845.0A Withdrawn CN111444258A (en) | 2020-02-11 | 2020-02-11 | Medical data sharing method based on block chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111444258A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935115A (en) * | 2020-07-30 | 2020-11-13 | 南京中诚区块链研究院有限公司 | Block chain adopting multiple information integration modes |
| CN112562811A (en) * | 2020-12-15 | 2021-03-26 | 昆明理工大学 | Thin client electronic medical data secure sharing method based on block chain |
| CN112948458A (en) * | 2021-02-04 | 2021-06-11 | 北京百度网讯科技有限公司 | Query method and device based on block chain |
| CN113067846A (en) * | 2020-12-10 | 2021-07-02 | 国网浙江省电力有限公司温州供电公司 | Block chain-based power distribution system data sharing method |
| CN113851203A (en) * | 2021-12-01 | 2021-12-28 | 南京可信区块链与算法经济研究院有限公司 | Neonate eye ground screening collaborative learning method and system based on novel POS mechanism |
| CN114065246A (en) * | 2021-11-16 | 2022-02-18 | 上海柯林布瑞信息技术有限公司 | Medical block chain data uplink method and device |
| CN114239044A (en) * | 2021-10-18 | 2022-03-25 | 国网内蒙古东部电力有限公司 | Decentralized traceable shared access system |
| CN114708990A (en) * | 2022-06-07 | 2022-07-05 | 肺诊网(苏州)网络科技有限公司 | Remote digital media sharing method and system based on 5G internet |
| CN114822744A (en) * | 2022-05-10 | 2022-07-29 | 中国联合网络通信集团有限公司 | Medical treatment data sharing method, system, computing equipment and storage medium |
| CN116403671A (en) * | 2023-06-08 | 2023-07-07 | 武汉大学人民医院（湖北省人民医院） | Data risk identification method applied to medical scene |
| CN116684091A (en) * | 2023-07-24 | 2023-09-01 | 安徽省大数据中心 | Relay multi-level data blockchain sharing method and system based on quantum key distribution |
-
2020
- 2020-02-11 CN CN202010085845.0A patent/CN111444258A/en not_active Withdrawn
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111935115A (en) * | 2020-07-30 | 2020-11-13 | 南京中诚区块链研究院有限公司 | Block chain adopting multiple information integration modes |
| CN113067846A (en) * | 2020-12-10 | 2021-07-02 | 国网浙江省电力有限公司温州供电公司 | Block chain-based power distribution system data sharing method |
| CN112562811A (en) * | 2020-12-15 | 2021-03-26 | 昆明理工大学 | Thin client electronic medical data secure sharing method based on block chain |
| CN112562811B (en) * | 2020-12-15 | 2023-09-15 | 昆明理工大学 | Block chain-based electronic medical data secure sharing method for thin clients |
| CN112948458A (en) * | 2021-02-04 | 2021-06-11 | 北京百度网讯科技有限公司 | Query method and device based on block chain |
| CN112948458B (en) * | 2021-02-04 | 2023-08-18 | 北京百度网讯科技有限公司 | Block chain-based query method and device |
| CN114239044A (en) * | 2021-10-18 | 2022-03-25 | 国网内蒙古东部电力有限公司 | Decentralized traceable shared access system |
| CN114065246B (en) * | 2021-11-16 | 2022-08-19 | 上海柯林布瑞信息技术有限公司 | Medical block chain data uplink method and device |
| CN114065246A (en) * | 2021-11-16 | 2022-02-18 | 上海柯林布瑞信息技术有限公司 | Medical block chain data uplink method and device |
| CN113851203A (en) * | 2021-12-01 | 2021-12-28 | 南京可信区块链与算法经济研究院有限公司 | Neonate eye ground screening collaborative learning method and system based on novel POS mechanism |
| CN114822744A (en) * | 2022-05-10 | 2022-07-29 | 中国联合网络通信集团有限公司 | Medical treatment data sharing method, system, computing equipment and storage medium |
| CN114708990B (en) * | 2022-06-07 | 2022-09-06 | 肺诊网(苏州)网络科技有限公司 | Remote digital media sharing method and system based on 5G internet |
| CN114708990A (en) * | 2022-06-07 | 2022-07-05 | 肺诊网(苏州)网络科技有限公司 | Remote digital media sharing method and system based on 5G internet |
| CN116403671A (en) * | 2023-06-08 | 2023-07-07 | 武汉大学人民医院（湖北省人民医院） | Data risk identification method applied to medical scene |
| CN116403671B (en) * | 2023-06-08 | 2023-09-22 | 武汉大学人民医院（湖北省人民医院） | Data risk identification method applied to medical scene |
| CN116684091A (en) * | 2023-07-24 | 2023-09-01 | 安徽省大数据中心 | Relay multi-level data blockchain sharing method and system based on quantum key distribution |
| CN116684091B (en) * | 2023-07-24 | 2023-10-31 | 安徽省大数据中心 | Relay multi-level data blockchain sharing method and system based on quantum key distribution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111444258A (en) | Medical data sharing method based on block chain | |
| Fan et al. | Medblock: Efficient and secure medical data sharing via blockchain | |
| Riad et al. | Sensitive and energetic IoT access control for managing cloud electronic health records | |
| di Vimercati et al. | Managing and accessing data in the cloud: Privacy risks and approaches | |
| CN110321721B (en) | Block chain-based electronic medical record access control method | |
| CN113067857B (en) | Electronic medical record cross-hospital sharing method based on double-chain structure | |
| CN112863629B (en) | Block chain-based medical electronic medical record distributed management system and preparation method thereof | |
| Li et al. | Scalable and secure sharing of personal health records in cloud computing using attribute-based encryption | |
| Jiang et al. | Attribute-based encryption with blockchain protection scheme for electronic health records | |
| JP2009541861A (en) | Advanced access control for medical ad hoc body sensor networks | |
| Abouali et al. | Blockchain framework for secured on-demand patient health records sharing | |
| KR20120041904A (en) | Proxy based privilege management method and apparatus for accessing health data in cloud computing environment | |
| Liang | Identity verification and management of electronic health records with blockchain technology | |
| Cong et al. | Individual-initiated auditable access control for privacy-preserved IoT data sharing with blockchain | |
| Matos et al. | Securing electronic health records in the cloud | |
| Kumar et al. | A novel privacy preserving blockchain based secure storage framework for electronic health records | |
| Hong et al. | Secure Access Control for Electronic Health Records in Blockchain-Enabled Consumer Internet of Medical Things | |
| Lavanya et al. | Secure tamper-resistant electronic health record transaction in cloud system via blockchain | |
| Hamsanandhini et al. | Health record maintenance using cloud computing and multi authority attribute based encryption | |
| Debnath et al. | A secure revocable personal health record system with policy-based fine-grained access control | |
| Yuan et al. | B‐SSMD: A Fine‐Grained Secure Sharing Scheme of Medical Data Based on Blockchain | |
| Liu et al. | Blockchain-based medical data storage and sharing system | |
| Zaghloul et al. | An attribute-based distributed data sharing scheme | |
| Abouakil et al. | Data models for the pseudonymization of DICOM data | |
| De Oliveira et al. | Red Alert: break-glass protocol to access encrypted medical records in the cloud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200724 |