Haruyuki Kawahara

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4964801 Endosseous implant having polycapillary structureExpiredOct 20, 89Oct 23, 90[A61C]
4957819 Frameless and coreless porous endosseous implantExpiredMay 30, 89Sep 18, 90[G22F]
4904448 Patch test materials for the detection of metal allergiesExpiredJul 22, 88Feb 27, 90[A61F, G01N]
4842517 Endosseous implant having mesh pore structureExpiredSep 30, 87Jun 27, 89[A61C]
4731020 Removable denture retaining structureExpiredJul 24, 86Mar 15, 88[A61C]
4652593 Dental aluminate cement compositionsExpiredFeb 12, 86Mar 24, 87[A61K]
4647600 Dental cement compositionsExpiredFeb 12, 86Mar 03, 87[A61K]

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