CA3067050A1 - Implant for injured nerve tissue prosthetics, method of surgical treatment for injured nerve tissue and use of porous polytetrafluorethylene - Google Patents
Implant for injured nerve tissue prosthetics, method of surgical treatment for injured nerve tissue and use of porous polytetrafluorethylene Download PDFInfo
- Publication number
- CA3067050A1 CA3067050A1 CA3067050A CA3067050A CA3067050A1 CA 3067050 A1 CA3067050 A1 CA 3067050A1 CA 3067050 A CA3067050 A CA 3067050A CA 3067050 A CA3067050 A CA 3067050A CA 3067050 A1 CA3067050 A1 CA 3067050A1
- Authority
- CA
- Canada
- Prior art keywords
- nerve tissue
- implant
- nerve
- spinal cord
- pores
- 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.)
- Abandoned
Links
- 239000007943 implant Substances 0.000 title claims abstract description 132
- 210000000944 nerve tissue Anatomy 0.000 title claims abstract description 116
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000001356 surgical procedure Methods 0.000 title claims description 11
- -1 polytetrafluorethylene Polymers 0.000 title description 5
- 210000000278 spinal cord Anatomy 0.000 claims abstract description 173
- 239000011148 porous material Substances 0.000 claims abstract description 83
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 72
- 208000037816 tissue injury Diseases 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000006378 damage Effects 0.000 claims description 64
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- 238000006467 substitution reaction Methods 0.000 claims description 4
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- 241000700159 Rattus Species 0.000 description 56
- 210000002569 neuron Anatomy 0.000 description 52
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- 210000005036 nerve Anatomy 0.000 description 44
- 210000000115 thoracic cavity Anatomy 0.000 description 34
- 208000027418 Wounds and injury Diseases 0.000 description 32
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- 229940088598 enzyme Drugs 0.000 description 28
- 108010022752 Acetylcholinesterase Proteins 0.000 description 26
- 102000012440 Acetylcholinesterase Human genes 0.000 description 26
- 229940022698 acetylcholinesterase Drugs 0.000 description 20
- 230000001172 regenerating effect Effects 0.000 description 18
- 210000002808 connective tissue Anatomy 0.000 description 16
- 230000001744 histochemical effect Effects 0.000 description 14
- 210000003050 axon Anatomy 0.000 description 12
- 238000001514 detection method Methods 0.000 description 12
- 208000020431 spinal cord injury Diseases 0.000 description 12
- 210000003169 central nervous system Anatomy 0.000 description 10
- 230000001713 cholinergic effect Effects 0.000 description 10
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 241001465754 Metazoa Species 0.000 description 8
- 102000019259 Succinate Dehydrogenase Human genes 0.000 description 8
- 108010012901 Succinate Dehydrogenase Proteins 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000002513 implantation Methods 0.000 description 8
- VMGAPWLDMVPYIA-HIDZBRGKSA-N n'-amino-n-iminomethanimidamide Chemical compound N\N=C\N=N VMGAPWLDMVPYIA-HIDZBRGKSA-N 0.000 description 8
- BOLDJAUMGUJJKM-LSDHHAIUSA-N renifolin D Natural products CC(=C)[C@@H]1Cc2c(O)c(O)ccc2[C@H]1CC(=O)c3ccc(O)cc3O BOLDJAUMGUJJKM-LSDHHAIUSA-N 0.000 description 8
- 239000013049 sediment Substances 0.000 description 8
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- WZUVPPKBWHMQCE-XJKSGUPXSA-N (+)-haematoxylin Chemical compound C12=CC(O)=C(O)C=C2C[C@]2(O)[C@H]1C1=CC=C(O)C(O)=C1OC2 WZUVPPKBWHMQCE-XJKSGUPXSA-N 0.000 description 6
- WZUVPPKBWHMQCE-UHFFFAOYSA-N Haematoxylin Natural products C12=CC(O)=C(O)C=C2CC2(O)C1C1=CC=C(O)C(O)=C1OC2 WZUVPPKBWHMQCE-UHFFFAOYSA-N 0.000 description 6
- 102000000428 Lactate Dehydrogenases Human genes 0.000 description 6
- 108010080864 Lactate Dehydrogenases Proteins 0.000 description 6
- 238000010826 Nissl staining Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
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- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 6
- 239000008187 granular material Substances 0.000 description 6
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- 239000000463 material Substances 0.000 description 6
- 210000004498 neuroglial cell Anatomy 0.000 description 6
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 206010020880 Hypertrophy Diseases 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- OIPILFWXSMYKGL-UHFFFAOYSA-N acetylcholine Chemical compound CC(=O)OCC[N+](C)(C)C OIPILFWXSMYKGL-UHFFFAOYSA-N 0.000 description 4
- 229960004373 acetylcholine Drugs 0.000 description 4
- 210000001130 astrocyte Anatomy 0.000 description 4
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- 235000002639 sodium chloride Nutrition 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
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- 125000003831 tetrazolyl group Chemical group 0.000 description 4
- 238000003325 tomography Methods 0.000 description 4
- 238000002054 transplantation Methods 0.000 description 4
- 208000005422 Foreign-Body reaction Diseases 0.000 description 2
- 101000800116 Homo sapiens Thy-1 membrane glycoprotein Proteins 0.000 description 2
- 102000003855 L-lactate dehydrogenase Human genes 0.000 description 2
- 108700023483 L-lactate dehydrogenases Proteins 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 102100033523 Thy-1 membrane glycoprotein Human genes 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
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- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 239000002771 cell marker Substances 0.000 description 2
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 208000035475 disorder Diseases 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
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- 230000002414 glycolytic effect Effects 0.000 description 2
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- 239000003324 growth hormone secretagogue Substances 0.000 description 2
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- 208000015181 infectious disease Diseases 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000030214 innervation Effects 0.000 description 2
- 210000001937 intercostal nerve Anatomy 0.000 description 2
- 238000002684 laminectomy Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004660 morphological change Effects 0.000 description 2
- 230000037023 motor activity Effects 0.000 description 2
- 230000007830 nerve conduction Effects 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 210000000130 stem cell Anatomy 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000008467 tissue growth Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229950003937 tolonium Drugs 0.000 description 2
- HNONEKILPDHFOL-UHFFFAOYSA-M tolonium chloride Chemical compound [Cl-].C1=C(C)C(N)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 HNONEKILPDHFOL-UHFFFAOYSA-M 0.000 description 2
- 230000008736 traumatic injury Effects 0.000 description 2
- 230000004102 tricarboxylic acid cycle Effects 0.000 description 2
- 210000001153 interneuron Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
- A61B17/1128—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis of nerves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/0077—Special surfaces of prostheses, e.g. for improving ingrowth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/0077—Special surfaces of prostheses, e.g. for improving ingrowth
- A61F2002/0081—Special surfaces of prostheses, e.g. for improving ingrowth directly machined on the prosthetic surface, e.g. holes, grooves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/32—Materials or treatment for tissue regeneration for nerve reconstruction
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Dermatology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Dispersion Chemistry (AREA)
- Surgery (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Neurology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Medicinal Preparation (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BYA20170215 | 2017-06-13 | ||
| BY20170215 | 2017-06-13 | ||
| PCT/BY2017/000017 WO2018227264A1 (en) | 2017-06-13 | 2017-09-26 | Implant for injured nerve tissue prosthetics, method of surgical treatment for injured nerve tissue and use of porous polytetrafluorethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3067050A1 true CA3067050A1 (en) | 2018-12-20 |
Family
ID=60153014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3067050A Abandoned CA3067050A1 (en) | 2017-06-13 | 2017-09-26 | Implant for injured nerve tissue prosthetics, method of surgical treatment for injured nerve tissue and use of porous polytetrafluorethylene |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20200138439A1 (enExample) |
| EP (1) | EP3638325A1 (enExample) |
| JP (1) | JP7055269B2 (enExample) |
| KR (1) | KR20200043972A (enExample) |
| CN (1) | CN111093722A (enExample) |
| CA (1) | CA3067050A1 (enExample) |
| EA (1) | EA201900579A1 (enExample) |
| IL (1) | IL271632A (enExample) |
| WO (1) | WO2018227264A1 (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12115058B2 (en) * | 2019-02-22 | 2024-10-15 | Toray Industries, Inc. | Nerve regeneration-inducing tube |
| CN114917406B (zh) * | 2022-04-14 | 2023-08-08 | 北京大学第三医院（北京大学第三临床医学院） | 一种能够促进自我选择性神经修复的纳米管 |
| WO2025091101A1 (en) | 2023-11-02 | 2025-05-08 | Joint Stock Company 'altimed' | Suture material and surgical suture kit |
| WO2025189269A1 (en) * | 2024-03-15 | 2025-09-18 | Joint Stock Company 'altimed' | Implant for injured nerve tissue regeneration and use of implant |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU564103B2 (en) * | 1983-02-02 | 1987-07-30 | Minnesota Mining And Manufacturing Company | Absorbable nerve repair device and method |
| US4877029A (en) * | 1987-03-30 | 1989-10-31 | Brown University Research Foundation | Semipermeable nerve guidance channels |
| US6102921A (en) * | 1990-12-21 | 2000-08-15 | University Of New Mexico | Nerve anastomosis sling and method |
| RU2195941C2 (ru) | 2000-06-19 | 2003-01-10 | Государственное учреждение Научно-исследовательский институт клинической иммунологии СО РАМН | Способ лечения травматических повреждений спинного мозга |
| US20030181978A1 (en) | 2002-03-25 | 2003-09-25 | Brown Kelly R. | Channeled biomedical foams and method for producing same |
| US8202725B2 (en) * | 2004-12-23 | 2012-06-19 | Tissue Genesis Incorporated | Cell sodding method and apparatus |
| BY10325C1 (en) | 2002-04-23 | 2003-12-30 | Closed Joint Stock Company | Method for producing a porous implant from titanium powder |
| US7147647B2 (en) | 2002-04-26 | 2006-12-12 | Medtronic, Inc. | Sintered titanium tube for the management of spinal cord injury |
| US7931687B2 (en) * | 2002-05-13 | 2011-04-26 | Articular Engineering, Llc | Tissue engineered osteochondral implant |
| US20060287659A1 (en) * | 2003-08-22 | 2006-12-21 | Tepha, Inc. | Polyhydroxyalkanoate nerve regeneration devices |
| US7846466B2 (en) * | 2004-06-10 | 2010-12-07 | Northwestern University | Biodegradable scaffolds and uses thereof |
| KR101649457B1 (ko) * | 2006-04-25 | 2016-08-19 | 칠드런'즈 메디컬 센터 코포레이션 | 개방창 및 폐쇄창 척수 손상의 치료를 위한 방법 및 조성물 |
| CN101653366B (zh) | 2009-06-11 | 2011-06-08 | 广州中大中山医科技开发有限公司 | 一种用于修复神经损伤的明胶海绵圆柱体支架的构建 |
| JP2013518591A (ja) * | 2010-02-02 | 2013-05-23 | ザ キュレーターズ オブ ザ ユニバーシティ オブ ミズーリ | 改変された生物学的神経移植片の製造およびその用途 |
| RU2608237C2 (ru) * | 2010-11-03 | 2017-01-17 | ЭТИКОН ЭлЭлСи | Самоудерживающиеся шовные материалы, выделяющие лекарственные средства, и относящиеся к ним методы |
| EP2750725B1 (en) | 2011-09-01 | 2020-09-16 | Anatoli D. Dosta | Dental implant, vascular implant and tissue implant made of porous three-dimensional structure of polytetrafluoroethylene |
| CN106421912A (zh) * | 2016-10-13 | 2017-02-22 | 中山大学 | 一种基质化去细胞神经支架的制备和应用 |
-
2017
- 2017-09-26 EP EP17787310.6A patent/EP3638325A1/en not_active Withdrawn
- 2017-09-26 JP JP2019569726A patent/JP7055269B2/ja active Active
- 2017-09-26 EA EA201900579A patent/EA201900579A1/ru unknown
- 2017-09-26 CN CN201780093021.4A patent/CN111093722A/zh active Pending
- 2017-09-26 WO PCT/BY2017/000017 patent/WO2018227264A1/en not_active Ceased
- 2017-09-26 CA CA3067050A patent/CA3067050A1/en not_active Abandoned
- 2017-09-26 KR KR1020207000730A patent/KR20200043972A/ko not_active Ceased
-
2019
- 2019-12-12 US US16/712,379 patent/US20200138439A1/en not_active Abandoned
- 2019-12-22 IL IL271632A patent/IL271632A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020523165A (ja) | 2020-08-06 |
| IL271632A (en) | 2020-02-27 |
| CN111093722A (zh) | 2020-05-01 |
| WO2018227264A1 (en) | 2018-12-20 |
| KR20200043972A (ko) | 2020-04-28 |
| JP7055269B2 (ja) | 2022-04-18 |
| EP3638325A1 (en) | 2020-04-22 |
| EA201900579A1 (ru) | 2020-04-21 |
| US20200138439A1 (en) | 2020-05-07 |
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