Assignee
KOKEN KK
JP59 patents
Top patents by PatentIndex Score
US6669711B1Dec 30, 2003
Operation balloon
KOKEN KK160 citations99
US4806595AFeb 21, 1989
Method of preparing antithrombogenic medical materials
KOKEN KK237 citations98
US4749689AJun 7, 1988
Hemostatic agent composed of collagen/gelatin and protamine
KOKEN KK132 citations98
US4133984AJan 9, 1979
Plug-type hearing device
KOKEN KK251 citations98
US6998268B2Feb 14, 2006
Gene preparations
KOKEN KK52 citations96
US6658614B1Dec 2, 2003
Boundary scan element and communication device made by using the same
KOKEN KK41 citations96
US5935303AAug 10, 1999
Electrostatic filter
KOKEN KK52 citations96
US4704131ANov 3, 1987
Medical materials
KOKEN KK92 citations96
US4559304ADec 17, 1985
Substratum for cell culture and a method for culturing and isolating cells using same
KOKEN KK58 citations96
US4413359ANov 8, 1983
Impermeable laminate membrane
KOKEN KK120 citations96
US4314380AFeb 9, 1982
Artificial bone
KOKEN KK134 citations96
US6177544B1Jan 23, 2001
Collagen-based auxiliary agent for ophthalmic surgery
KOKEN KK54 citations95
US5840054ANov 24, 1998
Method for obstructing lacrimal canaliculi with infusable solution or dispersion
KOKEN KK50 citations95
US5080670AJan 14, 1992
Bioprosthetic valve
KOKEN KK122 citations94
US5387236AFeb 7, 1995
Vascular prosthesis, manufacturing method of the same, and substrate for vascular prosthesis
KOKEN KK87 citations93
US5171261ADec 15, 1992
Vascular prosthesis, manufacturing method of the same, and substrate for vascular prothesis
KOKEN KK47 citations93
US4592864AJun 3, 1986
Aqueous atelocollagen solution and method of preparing same
KOKEN KK83 citations93
US4833200AMay 23, 1989
Antithrombogenic medical material and method of preparing same
KOKEN KK26 citations92
US4695281ASep 22, 1987
Medical material
KOKEN KK25 citations92
US5314874AMay 24, 1994
Intracorporeally injectable composition for implanting highly concentrated cross-linked atelocollagen
KOKEN KK101 citations91
US4642118AFeb 10, 1987
Man-made skin composed of two layers: collagen and a poly-alpha-amino acid
KOKEN KK25 citations91
US4137906AFeb 6, 1979
Catheter apparatus with occlusion and flow diverting means
KOKEN KK104 citations91
US7195015B2Mar 27, 2007
Breathing apparatus
KOKEN KK21 citations90
US4883487ANov 28, 1989
Method of producing an artifical skin
KOKEN KK34 citations90
US7018359B2Mar 28, 2006
Inner pressure indicator of cuff
KOKEN KK32 citations89
US4565580AJan 21, 1986
Substrate consisting of regenerated collagen fibrils and method of manufacturing same
KOKEN KK46 citations89
US4215689AAug 5, 1980
Injecting apparatus for medical liquid
KOKEN KK44 citations87
US6928686B2Aug 16, 2005
Washing apparatus for endoscope
KOKEN KK28 citations85
US6514614B1Feb 4, 2003
Coated nucleus for a cultured pearl
KOKEN KK17 citations84
US7052875B1May 30, 2006
Stable gene preparations
KOKEN KK14 citations80
US8030361B2Oct 4, 2011
Cell culture carrier implantable in vivo
KOKEN KK9 citations73
US6622262B1Sep 16, 2003
Fault tolerant computer system
KOKEN KK7 citations73
US4984623AJan 15, 1991
Electrode water circulation and processing system and hooded radiator for water rheostat
KOKEN KK7 citations73
US4910457AMar 20, 1990
Water resistance load system
KOKEN KK8 citations73
US4853621AAug 1, 1989
Water resistance load system
KOKEN KK11 citations73
US4512108AApr 23, 1985
Lens working apparatus
KOKEN KK9 citations73
USD1036652SJul 23, 2024
Mask
KOKEN KK3 citations72
US4874511AOct 17, 1989
Apatite chromatography column system
KOKEN KK16 citations72
US4690973ASep 1, 1987
Production process of an antithrombogenic and antiadhesive material for medical use
KOKEN KK13 citations71
US6701475B1Mar 2, 2004
Boundary scanning element and communication equipment using the same
KOKEN KK1 citations62
US4939500AJul 3, 1990
Electrode water circulation and processing system and hooded radiator for water rheostat
KOKEN KK3 citations62
US9901758B2Feb 27, 2018
Respiratory protection device
KOKEN KK3 citations61
US4840937AJun 20, 1989
Surfactant composed of acylated collagen or acylated gelatine and a production process thereof
KOKEN KK2 citations60
US4963358AOct 16, 1990
Agent for inhibiting proliferation of human malignant tumor cells
KOKEN KK4 citations59
US4810495AMar 7, 1989
Agent for inhibiting proliferation of human malignant tumor cells
KOKEN KK5 citations59
US4714758ADec 22, 1987
Surfactant composed of acylated collagen or acylated gelatine and a production process thereof
KOKEN KK5 citations59
US4595657AJun 17, 1986
Process for preparing an inhibiting agent against proliferation of animals malignant tumor cells
KOKEN KK4 citations59
US12303613B2May 20, 2025
High-strength collagen sponge
KOKEN KK0 citations55
US11559603B2Jan 24, 2023
High-strength collagen sponge
KOKEN KK1 citations55
US10638802B2May 5, 2020
Mask provided with latch
KOKEN KK3 citations55
Showing the top 50 of 59 patents by PatentIndex Score.